1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2013 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that the appropriate manual has already been updated.
19 --- means no change in the manuals is called for.
20 When you add a new item, please add it without either +++ or ---
21 so we will look at it and add it to the manual.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with POSIX ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--without-acl'.
31 * Startup Changes in Emacs 24.4
32 * Changes in Emacs 24.4
35 ** `apropos-variable' is now `apropos-user-option'
36 `apropos-user-option' shows all user options while `apropos-variable'
37 shows all variables. When called with a universal prefix argument,
38 the two commands swap their behaviors. When `apropos-do-all' is
39 non-nil, they output the same results.
42 ** `eval-defun' on an already defined defcustom calls the :set function,
45 ** The option `set-mark-default-inactive' has been deleted.
46 This unfinished feature was introduced by accident in Emacs 23.1;
47 simply disabling Transient Mark mode does the same thing.
49 ** `initial-buffer-choice' can now specify a function to set up the
52 ** ACL support has been added.
54 *** Emacs preserves the ACL entries of files when backing up.
56 *** New functions `file-acl' and `set-file-acl' get and set the ACL
57 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
58 libacl. On MS-Windows, the NT Security APIs are used to emulate the
61 ** New option `scroll-bar-adjust-thumb-portion'.
62 Available only on X, this option allows to control over-scrolling
63 using the scroll bar (i.e. dragging the thumb down even when the end
64 of the buffer is visible).
66 ** Nextstep (GNUstep / Mac OS X) port
68 *** Improved fullscreen support.
69 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
70 Customize ns-use-native-fullscreen to change style. For >= 10.7
71 native is the default.
73 * Editing Changes in Emacs 24.4
75 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
76 bound to <f11> and M-<f10>, respectively.
79 * Changes in Specialized Modes and Packages in Emacs 24.4
81 ** Delphi mode is now called OPascal mode.
82 *** All delphi-* variables and functions have been renamed to opascal-*.
83 *** `delphi-newline-always-indents' is not supported any more
84 use `electric-indent-mode' instead.
85 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
87 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
89 ** completing-read-multiple's separator can now be a regexp.
90 The default separator is changed to allow surrounding spaces around the comma.
94 *** Battery information via the BSD `apm' utility is now supported.
98 *** New macro cl-tagbody.
101 *** letf is now just an alias for cl-letf.
105 *** Calc by default now uses the Gregorian calendar for all dates, and
106 uses January 1, 1 AD as its day number 1. Previously Calc used the
107 Julian calendar for dates before September 14, 1752, and it used
108 December 31, 1 BC as its day number 1; the new scheme is more
109 consistent with Calendar's calendrical system and day numbering.
111 *** The new variable `calc-gregorian-switch' lets you configure the
112 date when Calc switches from the Julian to the Gregorian calendar.
113 Nil, the default value, means to always use the Gregorian calendar.
114 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
117 *** Support for ISO 8601 dates.
121 *** New option `erc-accidental-paste-threshold-seconds'.
122 If set to a number, this can be used to avoid accidentally paste large
123 amounts of data into the ERC input.
125 ** Icomplete is a bit more like IDO.
126 *** key bindings to navigate through and select the completions.
127 *** The icomplete-separator is customizable, and its default has changed.
128 *** Removed icomplete-show-key-bindings.
132 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
133 visit the next image file and the previous image file in the same
134 directory, respectively.
137 *** The command `image-mode-fit-frame' deletes other windows.
138 When toggling, it restores the frame's previous window configuration.
139 It also has an optional frame argument, which can be used by Lisp
140 callers to fit the image to a frame other than the selected frame.
144 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
145 and adds it to the search string.
147 ** MH-E has been updated to MH-E version 8.4.
148 See MH-E-NEWS for details.
151 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
152 Customize `unrmail-mbox-format' to change this.
155 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
156 of how Rmail displays non-MIME messages.
159 ** New function `ses-rename-cell' to give SES cells arbitrary names.
161 ** trace-function was largely rewritten.
162 New features include:
163 - no prompting for the destination buffer, unless a prefix-arg was used.
164 - additionally to prompting for a destination buffer, when a prefix-arg is
165 used, the user can enter a "context", i.e. Lisp expression whose value at the
166 time the function is entered/exited will be printed along with the function
167 name and arguments. Useful to trace the value of (current-buffer) or
168 (point) when the function is invoked.
170 ** New command `delete-duplicate-lines' has two types of operation:
171 when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
172 it works like the utility `uniq'. Otherwise by default it deletes
173 duplicate lines everywhere in the region without regard to adjacency.
175 ** New `cycle-spacing' command allows cycling between having just one
176 space, no spaces, or reverting to the original spacing. Like
177 `just-one-space' command it can handle or ignore newlines and
178 leave different number of spaces.
182 *** New connection method "adb", which allows to access Android
183 devices by the Android Debug Bridge. The variable `tramp-adb-sdk-dir'
184 must be set to the Android SDK installation directory.
186 *** Handlers for `file-acl' and `set-file-acl' for remote machines
187 which support POSIX ACLs.
191 *** The commands `woman-default-faces' and `woman-monochrome-faces'
192 are obsolete. Customize the `woman-* faces instead.
194 ** Obsolete packages:
196 *** longlines.el is obsolete; use visual-line-mode instead.
198 *** terminal.el is obsolete; use term.el instead.
201 * New Modes and Packages in Emacs 24.4
202 ** New nadvice.el package offering lighter-weight advice facilities.
204 - add-function/remove-function which can be used to add/remove code on any
205 function-carrying place, such as process-filters or `<foo>-function' hooks.
206 - advice-add/advice-remove to add/remove a piece of advice on a named function,
207 much like `defadvice' does.
209 * Incompatible Lisp Changes in Emacs 24.4
211 ** frame-local variables that affect redisplay do not work any more.
212 More specifically, the redisplay does not bother to check for a frame-local
213 value when looking up variables.
215 ** nil and "unbound" are indistinguishable in symbol-function.
216 `symbol-function' never signals `void-function' any more.
217 `fboundp' returns non-nil if the symbol was `fset' to nil.
219 ** `defadvice' does not honor the `freeze' flag and cannot advise
220 special-forms any more.
222 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
223 VAR was bound to nil which was not tremendously useful and just lead to
224 spurious warnings about an unused var.
226 ** The return value of `backup-buffer' has changed.
227 The second argument is no longer an SELinux context, instead it is an
228 alist of extended attributes as returned by the new function
229 `file-extended-attributes'. The attributes can be applied to another
230 file using `set-file-extended-attributes'.
232 * Lisp changes in Emacs 24.4
234 ** Support for filesystem notifications.
235 Emacs now supports notifications of filesystem changes, such as
236 creation, modification, and deletion of files. This requires the
237 'inotify' API on GNU/Linux systems. On MS-Windows systems, this is
238 supported for Windows XP and newer versions.
242 *** The `face-spec-set' is now analogous to `setq' for face specs.
243 Its third arg now accepts values specifying exactly which face spec to
244 set (defface, custom, or user spec), and it directly sets the relevant
245 property using the supplied face spec.
247 *** Face specs set via Custom themes now replace the `defface' spec
248 rather than inheriting from it (as do face specs set via Customize).
250 *** New face characteristic (supports :underline (:style wave))
251 specifies whether or not the terminal can display a wavy line.
253 ** time-to-seconds is not obsolete any more.
254 ** New function special-form-p.
255 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
256 text-property on the first char.
258 ** The `defalias-fset-function' property lets you catch calls to defalias
259 and redirect them to your own function instead of `fset'.
261 ** The 9th element returned by `file-attributes' is now unspecified.
262 Formerly, it was t if the file's gid would change if file were deleted
263 and recreated. This value has been inaccurate for years on many
264 platforms, and nobody seems to have noticed or cared.
266 ** The function `file-ownership-preserved-p' now has an optional
267 argument GROUP which causes it check for file group too. This can be
268 used in place of the 9th element of `file-attributes'.
270 ** New functions `group-gid' and `group-real-gid'.
272 ** The 6th argument to `copy-file' has been renamed to
273 `preserve-extended-attributes' as it now handles both SELinux context
276 * Changes in Emacs 24.4 on non-free operating systems
279 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
280 The backtrace is written to the 'emacs_backtrace.txt' file in the
281 directory where Emacs was running.
284 * Installation Changes in Emacs 24.3
286 ** The default X toolkit is now Gtk+ version 3.
287 If you don't pass `--with-x-toolkit' to configure, or if you use
288 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
289 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
290 You can explicitly require a specific version by passing
291 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
293 ** New configure option `--enable-link-time-optimization', to utilize
294 an appropriate feature provided by GCC since version 4.5.0.
296 ** New configure option `--without-all' to disable most of the optional
297 features (image support, etc.) that are normally enabled by default.
299 ** New configure option `--enable-gcc-warnings' (for developing/debugging
300 Emacs). If building with GCC, this enables compile-time checks that
301 warn/give errors about possibly-questionable C code. On a recent GNU
302 system there should be no warnings; on older and on non-GNU systems
303 the results may be useful to developers.
305 ** The configure option `--enable-use-lisp-union-type' has been
306 renamed to `--enable-check-lisp-object-type', as the resulting
307 Lisp_Object type no longer uses a union to implement the compile time
308 check that this option enables.
310 ** The configure option `--disable-maintainer-mode' has been removed,
311 as it was confusingly-named and rarely useful.
313 ** The configure options `--program-prefix', `--program-suffix', and
314 `--program-transform-name' apply to more than just the installed
315 binaries. Now they also affect the man pages, icons, and the
316 etc/emacs.desktop file; but not the info pages, since this would break
317 links between the various manuals.
319 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
320 overwriting "emacs" in the installation bin/ directory with a link
323 ** Emacs uses libtinfo in preference to libncurses, if available.
325 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
326 /usr/pkg/lib to the linker search path. You must add them yourself if
329 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
330 (from the bin and libexec directories, respectively). The former is
331 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
334 * Startup Changes in Emacs 24.3
336 ** Emacs no longer searches for `leim-list.el' files beneath the standard
337 lisp/ directory. There should not be any there anyway. If you have
338 been adding them there, put them somewhere else; e.g., site-lisp.
340 ** The `--no-site-lisp' command line option now works for Nextstep builds.
343 * Changes in Emacs 24.3
347 *** `C-h f' (`describe-function') can now perform autoloading.
348 When this command is called for an autoloaded function whose docstring
349 contains a key substitution construct, that function's library is
350 automatically loaded, so that the documentation can be shown
351 correctly. To disable this, set `help-enable-auto-load' to nil.
353 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
354 even after their associated libraries have been loaded (and the
355 autoloads have been redefined as functions).
359 *** Images displayed via ImageMagick now support transparency and the
360 :background image specification property.
362 *** When available, ImageMagick support is automatically enabled.
363 It is no longer necessary to call `imagemagick-register-types'
364 explicitly to install ImageMagick image types; that function is called
365 automatically at startup, or when customizing an imagemagick- option.
367 *** Setting `imagemagick-types-inhibit' to t now disables the use of
368 ImageMagick to view images. (You must call `imagemagick-register-types'
369 afterwards if you do not use customize to change this.)
371 *** The new variable `imagemagick-enabled-types' also affects which
372 ImageMagick types are treated as images. The function
373 `imagemagick-filter-types' returns the list of types that will be
378 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
379 next and previous path separator, respectively.
381 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
382 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
383 non-nil before enabling the mode.
387 *** New option `mode-line-default-help-echo' specifies the help text
388 (shown in a tooltip or in the echo area) for any part of the mode line
389 that does not have its own specialized help text.
391 *** You can now click mouse-3 in the coding system indicator to invoke
392 `set-buffer-file-coding-system'.
396 *** emacsclient now obeys string values for `initial-buffer-choice',
397 if it is told to open a new frame without specifying any file to visit
398 or expression to evaluate.
400 *** New option `server-auth-key' specifies a shared server key.
402 ** Emacs now generates backtraces on fatal errors.
403 On encountering a fatal error, Emacs now outputs a textual description
404 of the fatal signal, and a short backtrace on platforms like glibc
405 that support backtraces.
407 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
408 This minor mode replaces `toggle-read-only', which is now obsolete.
410 ** Most `y-or-n' prompts now allow you to scroll the selected window.
411 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
412 respectively, without exiting from the prompt.
414 ** In the Package Menu, newly-available packages are listed as "new",
415 and sorted above the other "available" packages by default.
417 ** If your Emacs was built from a bzr checkout, the new variable
418 `emacs-bzr-version' contains information about the bzr revision used.
420 ** New option `create-lockfiles' specifies usage of lockfiles.
421 It defaults to t. Changing it to nil inhibits the creation of lock
422 files (use this with caution).
424 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
425 variables on remote hosts.
427 ** The entry for PCL-CVS has been removed from the Tools menu.
428 The PCL-CVS commands are still available via the keyboard.
430 ** Using "unibyte: t" in Lisp source files is obsolete.
431 Use "coding: raw-text" instead.
433 ** Internationalization
435 *** New language environment: Persian.
437 *** New input method `vietnamese-vni'.
439 ** Nextstep (GNUstep / Mac OS X) port
441 *** Support for fullscreen and the frame parameter fullscreen.
443 *** A file dialog is used for open/save operations initiated from the
447 * Editing Changes in Emacs 24.3
449 ** Search and Replace
451 *** Non-regexp Isearch now performs "lax" space matching.
452 Each sequence of spaces in the supplied search string may match any
453 sequence of one or more whitespace characters, as specified by the
454 variable `search-whitespace-regexp'. (This variable is also used by a
455 similar existing feature for regexp Isearch.)
457 *** New Isearch command `M-s SPC' toggles lax space matching.
458 This applies to both ordinary and regexp Isearch.
460 *** New option `replace-lax-whitespace'.
461 If non-nil, `query-replace' uses flexible whitespace matching too.
464 *** Global `M-s _' starts a symbol (identifier) incremental search,
465 and `M-s _' in Isearch toggles symbol search mode.
466 `M-s c' in Isearch toggles search case-sensitivity.
468 ** Navigation commands
470 *** New binding `M-g c' for `goto-char'.
472 *** New binding `M-g TAB' for `move-to-column'.
474 *** `M-g TAB' (`move-to-column') prompts for a column number if called
475 interactively with no prefix arg. Previously, it moved to column 1.
477 ** New option `yank-handled-properties' allows processing of text
478 properties on yanked text, in ways that are more general than just
479 removing them (as is done by `yank-excluded-properties').
481 ** New option `delete-trailing-lines' specifies whether
482 M-x delete-trailing-whitespace should delete trailing lines at the end
483 of the buffer. It defaults to t.
485 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
487 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
488 `ucs-insert' is now an obsolete alias for `insert-char'.
490 ** The `z' key no longer has a binding in most special modes.
491 It used to be bound to `kill-this-buffer', but `z' is too easy to
494 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
495 It copies the region-rectangle as the last rectangle kill.
499 *** `C-x r +' is now overloaded to invoke `append-to-register'.
501 *** New option `register-separator' specifies the register containing
502 the text to put between collected texts for use with
503 M-x append-to-register and M-x prepend-to-register.
506 * Changes in Specialized Modes and Packages in Emacs 24.3
508 ** Common Lisp emulation (CL)
510 *** CL's main entry is now (require 'cl-lib).
511 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
512 i.e., all its definitions have the "cl-" prefix (and internal definitions
513 use the "cl--" prefix).
515 If `cl' provided a feature under the name `foo', then `cl-lib'
516 provides it under the name `cl-foo' instead; with the exceptions of the
517 few `cl' definitions that had to use `foo*' to avoid conflicts with
518 pre-existing Elisp entities. These have been renamed to `cl-foo'
519 rather than `cl-foo*'.
521 The old `cl' is now deprecated and is mainly just a bunch of aliases that
522 provide the old, non-prefixed names. Some exceptions are listed below:
524 *** `cl-flet' is not like `flet' (which is deprecated).
525 Instead it obeys the behavior of Common-Lisp's `flet'.
526 In particular, in cl-flet function definitions are lexically scoped,
527 whereas in flet the scoping is dynamic.
529 *** `cl-labels' is slightly different from `labels'.
530 The difference is that it relies on the `lexical-binding' machinery
531 (as opposed to the `lexical-let' machinery used previously) to capture
532 definitions in closures, so such closures will only work if `lexical-binding'
535 *** `cl-letf' is not exactly like `letf'.
536 The only difference is in details that relate to some deprecated usage
537 of `symbol-function' in place forms.
539 *** `progv' was rewritten to use the `let' machinery.
540 A side effect is that variables without corresponding values are bound
541 to nil rather than being made unbound.
543 *** The following methods of extending `setf' are obsolete
544 (use features from gv.el instead):
545 `define-modify-macro' (use `gv-letplace')
546 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
547 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
548 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
552 *** Changes are now highlighted using the same color scheme as in
553 modern VCSes. Deletions are displayed in red (new faces
554 `diff-refine-removed' and `smerge-refined-removed', and new definition
555 of `diff-removed'), insertions in green (new faces `diff-refine-added'
556 and `smerge-refined-added', and new definition of `diff-added').
558 *** The variable `diff-use-changed-face' defines whether to use the
559 face `diff-changed', or `diff-removed' and `diff-added' to highlight
560 changes in context diffs.
562 *** The new command `diff-delete-trailing-whitespace' removes trailing
563 whitespace introduced by a diff.
565 ** Ediff now uses the same color scheme as Diff mode.
569 A new version of python.el, which provides several new features, including:
570 per-buffer shells, better indentation, Python 3 support, and improved
571 shell-interaction compatible with iPython (and virtually any other
574 *** Some user options have been replaced/renamed, including (old -> new):
575 **** python-indent -> python-indent-offset
576 **** python-guess-indent -> python-indent-guess-indent-offset
577 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
578 **** python-use-skeletons -> python-skeleton-autoinsert
580 *** Some user options have been removed, including:
582 **** `python-indent-string-contents': Strings are never indented.
584 **** `python-honour-comment-indentation':
585 Comments are always considered as indentation markers.
587 **** `python-continuation-offset': Indentation is automatically
588 calculated in a pep8 compliant way depending on the context.
590 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
591 Have no direct mapping as the shell interaction is completely different.
593 **** `python-python-command', `python-jython-command':
594 Replaced by `python-shell-interpreter'.
596 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
597 `python-pdbtrack-minor-mode-string', `python-source-modes':
600 *** Some commands have been replaced (old -> new):
601 **** python-insert-class -> python-skeleton-class
602 **** python-insert-def -> python-skeleton-def
603 **** python-insert-for -> python-skeleton-for
604 **** python-insert-if -> python-skeleton-if
605 **** python-insert-try/except -> python-skeleton-try
606 **** python-insert-try/finally -> python-skeleton-try
607 **** python-insert-while -> python-skeleton-while
608 **** python-find-function -> python-nav-jump-to-defun
609 **** python-next-statement -> python-nav-forward-sentence
610 **** python-previous-statement -> python-nav-backward-sentence
611 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
612 **** python-end-of-defun-function -> python-nav-end-of-defun
613 **** python-send-buffer -> python-shell-send-buffer
614 **** python-send-defun -> python-shell-send-defun
615 **** python-send-region -> python-shell-send-region
616 **** python-send-region-and-go -> emulate with python-shell-send-region
617 and python-shell-switch-to-shell
618 **** python-send-string -> python-shell-send-string
619 **** python-switch-to-python -> python-shell-switch-to-shell
620 **** python-describe-symbol -> python-eldoc-at-point
624 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
626 *** The D-Bus object manager interface is implemented.
628 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
629 if their value does not fit into Emacs's integer range.
631 *** The function `dbus-call-method' is now non-blocking.
632 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
634 *** Signals can also be sent as unicast messages.
636 *** The argument list of `dbus-register-signal' has been extended,
637 according to the new match rule types of D-Bus.
639 *** `dbus-init-bus' supports private connections.
641 *** There is a new function `dbus-setenv'.
643 ** `desktop-path' no longer includes the "." directory.
644 Desktop files are now located in ~/.emacs.d by default.
648 *** `dired-do-async-shell-command' executes each file sequentially
649 if the command ends in `;' (when operating on multiple files).
650 Otherwise, it executes the command on each file in parallel.
652 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
653 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
656 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
657 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
658 mark/unmark/flag all files in the active region.
660 *** The minibuffer default for `=' (`dired-diff) has changed.
661 It is now the backup file for the file at point, if one exists.
662 In Transient Mark mode the default is the file at the active mark.
664 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
665 The global binding for `M-=', `count-words-region' is in effect.
669 *** New module "notifications", which can send a notification when you
670 receive a private message or your nickname is mentioned.
672 *** ERC will look up server/channel names via auth-source and use any
675 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
676 only applies to messages sent by lurkers.
678 ** reStructuredText mode
680 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
681 fontification, comment handling, and customization have all been revised
684 *** Support for `imenu' and `which-function-mode'.
686 *** The reStructuredText syntax is more closely covered.
687 Sphinx support has been improved.
689 *** `rst-insert-list' inserts new list or continues existing lists.
691 *** A negative prefix argument always works for `rst-adjust'.
693 *** The window configuration is reset after displaying a TOC.
695 *** The constant `rst-version' describes the rst.el package version.
699 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
701 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
703 *** `sh-use-smie' lets you choose a new indentation and navigation code.
707 *** The free software compiler GHDL is supported (and now the default).
709 *** Support for the VHDL-AMS packages has been added/updated.
711 *** Updated to the 2002 revision of the VHDL standard.
713 *** Accepts \r and \f as whitespace.
717 *** The faces used by Apropos are now directly customizable.
718 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
719 see the `apropos' Custom group for details.
721 *** The old options whose values specified faces to use have been removed
722 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
726 *** This package has been rewritten to use Tabulated List mode.
728 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
729 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
733 *** Algebraic simplification mode is now the default.
734 To restrict to the limited simplifications given by the former
735 default simplification mode, use `m I'.
739 *** You can customize the header text that appears above each calendar month.
740 See the variable `calendar-month-header'.
742 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
744 *** The calendars produced by cal-html include holidays.
745 Customize `cal-html-holidays' to change this.
747 ** Compile has a new option `compilation-always-kill'.
751 *** `custom-reset-button-menu' now defaults to t.
753 *** Non-option variables are never matched in `customize-apropos' and
754 `customize-apropos-options' (i.e., the prefix argument does nothing for
759 *** The variables `term-default-fg-color' and `term-default-bg-color'
760 are now deprecated in favor of the customizable face `term'.
762 *** You can customize how to display ANSI terminal colors and styles
763 by customizing the corresponding `term-color-<COLOR>',
764 `term-color-underline' and `term-color-bold' faces.
768 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
770 *** Remote processes are now also supported on remote MS-Windows hosts.
774 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
775 Previously, this slot stored semicolon-separated attribute-value pairs
776 appended to some imap URLs, but this is not compatible with RFC 3986.
777 So now the `filename' slot stores the entire path and query components,
778 and the `attributes' slot is always nil.
780 *** New function `url-encode-url' for encoding a URI string.
781 The `url-retrieve' function now uses this to encode its URL argument,
782 in case that is not properly encoded.
784 ** notifications.el supports now version 1.2 of the Notifications API.
785 The function `notifications-get-capabilities' returns the supported
788 ** Flymake uses fringe bitmaps to indicate errors and warnings.
789 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
790 `flymake-warning-bitmap'.
792 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
793 specifying URL types that should be converted to remote file names at
794 the FFAP prompt. The default is now '("ftp").
796 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
797 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
799 ** New option `mouse-avoidance-banish-position' specifies where the
800 `banish' mouse avoidance setting moves the mouse.
802 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
803 closing brackets to be aligned with the line of the opening bracket.
805 ** In Proced mode, new command `proced-renice' renices marked processes.
807 ** New option `async-shell-command-buffer' specifies the buffer to use
808 for a new asynchronous `shell-command' when the default output buffer
809 `*Async Shell Command*' is already in use.
811 ** SQL mode has a new option `sql-db2-escape-newlines'.
812 If non-nil, newlines sent to the command interpreter will be escaped
813 by a backslash. The default does not escape the newlines and assumes
814 that the sql statement will be terminated by a semicolon.
816 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
817 (and modes that derive from it), sorts the column at point, or the Nth
818 column if a numeric prefix argument is given.
820 ** `which-func-modes' now defaults to t, so Which Function mode, when
821 enabled, applies to all applicable major modes.
823 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
826 ** Follow mode no longer works by using advice.
827 The option `follow-intercept-processes' has been removed.
829 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
831 ** Hooks renamed to avoid obsolete "-hooks" suffix:
832 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
833 *** semantic-change-hooks -> semantic-change-functions
834 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
835 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
836 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
837 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
838 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
839 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
840 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
841 *** rcirc-activity-hooks -> rcirc-activity-functions
842 *** rcirc-print-hooks -> rcirc-print-functions
843 *** dbus-event-error-hooks -> dbus-event-error-functions
844 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
845 *** checkdoc-style-hooks -> checkdoc-style-functions
846 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
847 *** archive-extract-hooks -> archive-extract-hook
848 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
849 *** hfy-post-html-hooks -> hfy-post-html-hook
850 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
851 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
852 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
853 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
858 In most cases, assoc+member+push+delq work just as well.
859 And in any case it's just a terrible package: ugly semantics, terrible
860 inefficiency, and not namespace-clean.
869 * Incompatible Lisp Changes in Emacs 24.3
871 ** Docstrings starting with `*' no longer indicate user options.
872 Only variables defined using `defcustom' are considered user options.
873 The function `user-variable-p' is now an obsolete alias for
876 ** The return values of `defalias', `defun' and `defmacro' have changed,
877 and are now undefined. For backwards compatibility, `defun' and
878 `defmacro' currently return the name of the newly defined
879 function/macro, but this should not be relied upon.
881 ** `random' by default now returns a different random sequence in
882 every Emacs run. Use `(random S)', where S is a string, to set the
883 random seed to a value based on S, in order to get a repeatable
884 sequence in later calls.
886 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
887 that substring is inserted literally even if the LITERAL arg is
888 non-nil, instead of causing an error to be signaled.
890 ** `select-window' now always makes the window's buffer current.
891 It does so even if the window was selected before.
893 ** The function `x-select-font' can return a font spec, instead of a
894 font name as a string. Whether it returns a font spec or a font name
895 depends on the graphical library.
897 ** `face-spec-set' no longer sets frame-specific attributes when the
898 third argument is a frame (that usage was obsolete since Emacs 22.2).
900 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
902 ** The CL package's `get-setf-method' function no longer exists.
903 Generalized variables are now part of core Emacs Lisp, and implemented
904 differently to the way cl.el used to do it. It is not possible to
905 define a compatible replacement for `get-setf-method'. See the file
906 gv.el for internal details of the new implementation.
908 ** The arguments of `dbus-register-signal' are no longer just strings,
909 but keywords or keyword-string pairs. The old argument list will
910 still be supported for Emacs 24.x.
912 ** Miscellaneous name changes
913 Some Lisp symbols have been renamed to correct their spelling,
914 or to be more consistent with standard Emacs terminology.
916 *** Renamed functions
917 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
918 **** inactivate-input-method -> deactivate-input-method
919 **** quail-inactivate -> quail-deactivate
920 **** robin-inactivate -> robin-deactivate
921 **** viper-inactivate-input-method -> viper-deactivate-input-method
922 **** viper-inactivate-input-method-action ->
923 viper-deactivate-input-method-action
924 **** ucs-input-inactivate -> ucs-input-deactivate
927 The old hooks are still supported for backward compatibility, but they
928 are deprecated and will be removed eventually.
929 **** input-method-inactivate-hook -> input-method-deactivate-hook
930 **** robin-inactivate-hook -> robin-deactivate-hook
931 **** quail-inactivate-hook -> quail-deactivate-hook
933 *** Renamed variables
934 **** follow-deactive-menu -> follow-inactive-menu
935 **** inactivate-current-input-method-function ->
936 deactivate-current-input-method-function
938 ** Some obsolete functions, variables, and faces have been removed:
939 *** `last-input-char', `last-command-char', `unread-command-char'
940 *** `facemenu-unlisted-faces'
941 *** `rmail-decode-mime-charset'
942 *** `iswitchb-read-buffer'
943 *** `sc-version', `sc-submit-bug-report'
944 *** `set-char-table-default'
945 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
946 *** `compile-internal'
948 *** `mode-line-inverse-video'
949 *** `follow-mode-off-hook'
950 *** `cvs-commit-buffer-require-final-newline'
951 (use `log-edit-require-final-newline' instead)
952 *** `cvs-changelog-full-paragraphs'
953 (use `log-edit-changelog-full-paragraphs' instead)
954 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
955 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
956 *** `vc-master-templates' (use `vc-handled-backends' instead)
957 *** `vc-checkout-carefully'
960 * Lisp changes in Emacs 24.3
962 ** CL-style generalized variables are now in core Elisp.
963 `setf' is autoloaded; `push' and `pop' accept generalized variables.
964 You can define your own generalized variables using `gv-define-simple-setter',
965 `gv-define-setter', etc.
967 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
968 This can significantly speed up execution of non-byte-compiled code,
969 but can also bump into previously unnoticed cyclic dependencies.
970 These are generally harmless: they will simply cause the macro calls
971 to be left for later expansion (as before), but will result in a
972 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
973 You may wish to restructure your code so this does not happen.
975 ** New sampling-based Elisp profiler.
976 Try M-x profiler-start, do some work, and then call M-x profiler-report.
977 When finished, use M-x profiler-stop. The sampling rate can be based on
978 CPU time or memory allocations.
980 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
981 The interpretation of the DECLS is determined by `defun-declarations-alist'.
983 ** New macros `setq-local' and `defvar-local'.
985 ** Face underlining can now use a wave.
987 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
988 of `read-regexp' accepts a string ending with a colon and space, and its
989 second argument DEFAULTS can be a list of strings accessible via `M-n'
990 in the minibuffer ahead of other hard-coded useful regexp-related values.
991 More commands use `read-regexp' now to read their regexp arguments.
995 *** New function `completion-table-with-quoting' to handle completion
996 in the presence of quoting, such as file completion in shell buffers.
998 *** New function `completion-table-subvert' to use an existing completion
999 table, but with a different prefix.
1003 *** New error type and new function `user-error'.
1004 These do not trigger the debugger.
1006 *** New option `debugger-bury-or-kill', saying what to do with the
1007 debugger buffer when exiting debug.
1009 *** Set `debug-on-message' to enter the debugger when a certain
1010 message is displayed in the echo area. This can be useful when trying
1011 to work out which code is doing something.
1013 *** New var `inhibit-debugger', automatically set to prevent accidental
1014 recursive invocations.
1018 *** New command `fit-frame-to-buffer' adjusts the frame height to
1021 *** The command `fit-window-to-buffer' can adjust the frame height
1022 if the new option `fit-frame-to-buffer' is non-nil.
1024 *** New macro `with-temp-buffer-window', similar to
1025 `with-output-to-temp-buffer'.
1027 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1030 *** New option `switch-to-buffer-preserve-window-point' to restore a
1031 window's point when switching buffers.
1033 *** New display action alist entries `window-height' and `window-width'
1034 specify the size of new windows created by `display-buffer'.
1036 *** New display action alist entry `pop-up-frame-parameters', if
1037 non-nil, specifies frame parameters to give any newly-created frame.
1039 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1040 tells display action functions to avoid changing which frame is
1043 *** New display action alist entry `previous-window', if non-nil,
1044 specifies window to reuse in `display-buffer-in-previous-window'.
1046 *** New display action functions `display-buffer-below-selected',
1047 and `display-buffer-in-previous-window'.
1049 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1050 now accept a third argument to avoid choosing the selected window.
1052 *** Additional values recognized for option `window-combination-limit'.
1054 *** The following variables are obsolete, as they can be replaced by
1055 appropriate entries in the `display-buffer-alist' function introduced
1057 **** `dired-shrink-to-fit'
1058 **** `display-buffer-reuse-frames'
1059 **** `display-buffer-function'
1060 **** `special-display-buffer-names'
1061 **** `special-display-frame-alist'
1062 **** `special-display-function'
1063 **** `special-display-regexps'
1067 *** `current-time-string' no longer requires that its argument's year
1068 must be in the range 1000..9999. It now works with any year supported
1069 by the underlying C implementation.
1071 *** `current-time' now returns extended-format time stamps
1072 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1073 PSEC is typically a multiple of 1000 on current machines. Other
1074 functions that use this format, such as `file-attributes' and
1075 `format-time-string', have been changed accordingly. Old-format time
1076 stamps are still accepted.
1078 *** The format of timers in `timer-list' and `timer-idle-list' is now
1079 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1080 The PSECS slot is new, and uses picosecond resolution. It can be
1081 accessed via the new `timer--psecs' accessor.
1083 *** Last-modified time stamps in undo lists now are of the form
1084 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1086 ** Floating point functions now always return special values like NaN,
1087 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1088 Previously, they returned NaNs on some platforms but signaled errors
1089 on others. The affected functions are acos, asin, tan, exp, expt,
1090 log, log10, sqrt, and mod.
1092 ** New fringe bitmap `exclamation-mark'.
1094 ** Miscellaneous changes to special forms and macros
1096 *** `defun' and `defmacro' are now macros rather than special forms.
1098 *** `kbd' is now a function rather than a macro.
1100 ** Miscellaneous new functions
1102 *** `set-temporary-overlay-map' sets up a temporary keymap that
1103 takes precedence over most other maps for a short while (normally one key).
1105 *** `autoloadp' tests if its argument is an autoloaded object.
1107 *** `autoload-do-load' performs the autoloading operation.
1109 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1111 *** `file-name-base' returns a file name sans directory and extension.
1113 *** `function-get' fetches a function property, following aliases.
1115 *** `posnp' tests if an object is a `posn'.
1117 *** `system-users' returns the user names on the system.
1119 *** `system-groups' returns the group names on the system.
1121 *** `tty-top-frame' returns the topmost frame of a text terminal.
1123 ** The following functions and variables are obsolete:
1124 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1125 *** `buffer-has-markers-at'
1126 *** `macro-declaration-function' (use `macro-declarations-alist')
1127 *** `window-system-version' (provides no useful information)
1128 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1129 *** `query-replace-interactive'
1130 *** `font-list-limit' (has had no effect since Emacs < 23)
1133 * Changes in Emacs 24.3 on non-free operating systems
1135 ** Cygwin builds can use the native MS Windows user interface.
1136 Pass `--with-w32' to configure. The default remains the X11 interface.
1138 ** Two new functions are available in Cygwin builds:
1139 `cygwin-convert-file-name-from-windows' and
1140 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1141 code to access the Cygwin file-name mapping machinery to convert
1142 between Cygwin and Windows-native file and directory names.
1144 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1145 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1146 `mouse-autoselect-window'.
1148 ** On MS Windows Vista and later Emacs now supports symbolic links.
1150 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1151 support for libxml2, even if its presence is detected.
1153 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1155 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1156 directories to the search path. You must add them yourself if you want them.
1159 * Changes in Emacs 24.2
1161 ** This is mainly a bug-fix release.
1164 * Installation Changes in Emacs 24.1
1166 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1167 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1168 also depend on Gtk+. You can disable them with --without-rsvg and
1171 ** Emacs can be compiled with GnuTLS support.
1172 This happens by default if a suitably recent version of the library is
1173 found at build time. To prevent this, use the configure option
1174 `--without-gnutls'. See below for GnuTLS features.
1176 ** Emacs can be compiled with SELinux support.
1177 This happens by default if a suitably recent version of the library is
1178 found at build time. To prevent this, use the configure option
1179 `--without-selinux'. See below for SELinux features.
1181 ** Emacs can be compiled with ImageMagick support.
1182 This happens by default if a suitably recent version of the library is
1183 found at build time. To prevent this, use the configure option
1184 `--without-imagemagick'. See below for ImageMagick features.
1185 This feature is not available for the Nextstep or MS ports.
1187 ** Emacs can be compiled with libxml2 support.
1188 This happens by default if a suitably recent version of the library is
1189 found at build time. To prevent this, use the configure option
1190 `--without-xml2'. See below for libxml2 features.
1192 ** By default, the installed Info and man pages are compressed.
1193 You can disable this by configuring --without-compress-info.
1195 ** New configure option --with-wide-int.
1196 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1197 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1200 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1201 These provide no new functionality, they just remove the need to edit
1202 lib-src/Makefile by hand in order to use the associated features.
1204 ** New configure option --enable-use-lisp-union-type.
1205 This is only useful for Emacs developers to debug certain types of bugs.
1206 This is not a new feature; only the configure flag is new.
1208 ** The standalone programs digest-doc and sorted-doc are removed.
1209 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1211 ** The standalone program `fakemail' is removed.
1212 If you need it, feedmail.el provides a superset of the functionality.
1215 * Startup Changes in Emacs 24.1
1217 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1218 command line arguments, and the EMACS_UNIBYTE environment variable, no
1219 longer have any effect. (They were declared obsolete in Emacs 23.)
1221 ** New command line option `--no-site-lisp' removes site-lisp directories
1222 from load-path. -Q now implies this. This option does not affect the
1223 EMACSLOADPATH environment variable (and hence has no effect for
1227 * Changes in Emacs 24.1
1231 *** Many packages now use the `completion-at-point' command,
1232 rather than implementing separate completion commands.
1234 *** `completion-at-point' now handles tags and semantic completion.
1236 *** Completion in a non-minibuffer now tries to detect the end of completion
1237 and pops down the *Completions* buffer accordingly.
1239 *** New option `completion-cycle-threshold' allows completion cycling.
1241 *** New option `completion-category-overrides' for overriding the
1242 default completion style in certain circumstances.
1244 *** New completion style `substring'.
1246 *** Completion of buffer names uses `substring' completion by default.
1248 *** The option `widget-complete-field' has been removed.
1252 *** The first time you try sending mail, Emacs asks for a mail method.
1253 This is implemented by a new default for `send-mail-function', which
1254 is `sendmail-query-once'. This offers to use the smtpmail package, or
1255 to use the old defaults relying on external mail facilities
1256 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1257 `mailclient-send-it' on Windows).
1259 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
1260 the report to your desktop's preferred mail client, if there is one.
1261 This uses either the "xdg-email" utility, or Mac OS's "open" command.
1263 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1264 and Mail mode changes
1266 ** Emacs server and client changes
1268 *** New option `server-port' specifies the port for TCP Emacs servers.
1270 *** New emacsclient argument -q/--quiet suppresses some status messages.
1272 *** New emacsclient argument --frame-parameters specifies the frame
1273 parameters of any newly-created graphical frame.
1275 *** If emacsclient shuts down due to Emacs signaling an error,
1276 its exit status is 1.
1278 *** New emacsclient argument --parent-id ID.
1279 This opens a client frame in parent X window ID, via XEmbed, similar
1280 to the --parent-id argument to Emacs.
1282 ** Internationalization changes
1284 *** Emacs now supports display and editing of bidirectional text.
1285 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1286 displayed in the correct visual order as expected by users of those
1287 scripts. The display reordering is a "full bidirectionality" class
1288 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1289 with no RTL text should look exactly the same as before.
1291 **** New buffer-local variable `bidi-display-reordering'.
1292 To disable display reordering in a buffer, change this to nil.
1294 **** New buffer-local variable `bidi-paragraph-direction'.
1295 If nil (the default), Emacs determines the base direction of each
1296 paragraph from its text, as specified by the UBA. Setting the value
1297 to `right-to-left' or `left-to-right' forces a base direction on each
1300 Paragraphs with right-to-left base direction are displayed starting at
1301 the right window edge.
1303 *** Enhanced support for characters with no glyphs in available fonts,
1304 or, on text terminals, characters that cannot be encoded by the
1305 terminal coding system. The new option `glyphless-char-display-control'
1306 specifies how to display them: as a hexadecimal code in a box, a thin
1307 1-pixel space, an empty box, etc.
1309 *** New input methods for Farsi and Bulgarian
1310 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1312 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1313 (U+2010 and U+2011).
1315 *** New Hebrew translation of the Emacs Tutorial.
1316 Type `C-u C-h t' to choose it in case your language setup doesn't
1317 automatically select it.
1319 ** An Emacs Lisp package manager is now included.
1320 This is a convenient way to download and install additional packages,
1321 from a package repository at http://elpa.gnu.org.
1323 *** M-x list-packages shows a list of packages, which can be
1324 selected for installation.
1326 *** New command `describe-package', bound to `C-h P'.
1328 *** By default, all installed packages are loaded automatically when
1329 Emacs starts up. To disable this, set `package-enable-at-startup' to
1330 nil. To specify the packages to load, customize `package-load-list'.
1332 ** Custom theme changes
1334 *** New command `M-x customize-themes', which provides a convenient
1335 interface for enabling and disabling Custom themes.
1337 *** New option `custom-theme-load-path' is the load path for themes.
1338 Emacs no longer looks for Custom themes in `load-path'. The default
1339 value of `custom-theme-load-path' says to look for themes in
1340 `custom-theme-directory', followed by a subdirectory of
1341 `data-directory' named "themes/", which contains a small selection of
1342 built-in Custom themes.
1344 *** New option `custom-safe-themes' records known-safe theme files.
1345 If a theme is not in this list, Emacs queries before loading it, and
1346 offers to save the theme to `custom-safe-themes' automatically. By
1347 default, all themes included in Emacs are treated as safe.
1349 ** Improved GTK integration
1351 *** GTK scroll-bars are now placed on the right by default.
1352 The function `set-scroll-bar-mode' can change this.
1354 *** GTK tool bars can have just text, just images or images and text.
1355 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1356 the default is taken from desktop settings.
1358 *** GTK tool bars can be placed on any edge of the frame.
1359 The frame-parameter tool-bar-position controls this. It takes the
1360 values top, left, right or bottom. The Options => Show/Hide menu has
1363 *** The default colors for selected text (the `region' face) are taken
1364 from the GTK theme when Emacs is built with GTK.
1366 *** Emacs uses GTK tooltips by default if built with GTK.
1367 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1369 ** Graphical interface changes
1371 *** On graphical displays, the mode-line no longer ends in dashes.
1372 Also, the first dash (which does not indicate anything) is just
1373 displayed as a space.
1375 *** `menu-bar-select-buffer-function' lets you choose another operation
1376 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1378 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1379 built with Xft. These fonts can be set via X resources, for example:
1380 Emacs.pane.menubar.font: Courier-12
1384 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1385 or if it receives a SIGINT signal in batch mode.
1387 *** `kill-emacs-hook' is now also run in batch mode.
1388 Third-party code which adds to `kill-emacs-hook' should check if they
1389 do the right thing in batch mode.
1391 ** Scrolling changes
1393 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1394 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1395 of buffer at first key-press (instead they move to top/bottom of buffer)
1396 when `scroll-error-top-bottom' is non-nil.
1398 *** New option `scroll-error-top-bottom' (see above).
1400 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1401 scroll a line instead of full screen.
1403 *** New property `scroll-command' should be set on a command's symbol to
1404 define it as a scroll command affected by `scroll-preserve-screen-position'.
1406 *** If you customize `scroll-conservatively' to a value greater than 100,
1407 Emacs will never recenter point in the window when it scrolls due to
1408 cursor motion commands or commands that move point (e.f., `M-g M-g').
1409 Previously, you needed to use `most-positive-fixnum' as the value of
1410 `scroll-conservatively' to achieve the same effect.
1412 *** "Aggressive" scrolling now honors the scroll margins.
1413 If you customize `scroll-up-aggressively' or
1414 `scroll-down-aggressively' and move point off the window, Emacs now
1415 scrolls the window so as to avoid positioning point inside the scroll
1418 ** Basic SELinux support has been added.
1419 This requires Emacs to be linked with libselinux at build time.
1421 *** Emacs preserves the SELinux file context when backing up.
1422 Also, the function `copy-file' has an extra optional argument for
1423 preserving SELinux context, and the return value of `backup-buffer'
1424 now includes the SELinux context.
1426 *** New functions `file-selinux-context' and `set-file-selinux-context'
1427 get and set the SELinux context of a file.
1431 *** `delete-by-moving-to-trash' now only affects commands that specify
1432 trashing. This avoids inadvertently trashing temporary files.
1434 *** Calling `delete-file' or `delete-directory' with a prefix argument
1435 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1437 ** File- and directory-local variable changes
1439 *** You can stop directory local vars from applying to subdirectories.
1440 Add an element (subdirs . nil) to the alist portion of any variables
1441 settings to indicate that the section should not apply to
1444 *** Directory local variables can apply to some file-less buffers.
1445 Affected modes include dired, vc-dir, and log-edit. For example,
1446 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1447 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1448 `hack-dir-local-variables-non-file-buffer' to support this.
1450 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1451 Instead, use "eval: (minor-mode 1)".
1453 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1454 to `inhibit-local-variables-regexps'. As the name suggests, it now
1455 applies to ALL file local variables, not just -*- lines. The
1456 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1461 *** The `quit-window' command now restores the last buffer displayed
1462 in the quitted window.
1464 *** Resizing an Emacs frame now preserves proportional window sizes,
1465 modulo restrictions like window minimum sizes and fixed-size windows.
1467 *** The behavior of `display-buffer' is now customizable in detail.
1469 **** New option `display-buffer-base-action' specifies a list of
1470 user-determined display "actions" (functions and optional arguments
1471 for choosing the displaying window).
1473 This takes precedence over the default display action, which is
1474 specified by `display-buffer-fallback-action'.
1476 **** New option `display-buffer-alist' maps buffer name regexps to
1477 display actions, taking precedence over `display-buffer-base-action'.
1479 *** New option `window-combination-limit'.
1480 The new option `window-combination-limit' allows to return the space
1481 obtained for resizing or creating a window more reliably to the window
1482 from which such space was obtained.
1484 *** New option `window-combination-resize'.
1485 The new option `window-combination-resize' allows to split a window that
1486 otherwise cannot be split because it's too small by stealing space from
1487 other windows in the same combination. Subsequent resizing or deletion
1488 of the window will resize all windows in the same combination as well.
1490 *** New option `frame-auto-hide-function' lets you choose between
1491 iconifying or deleting a frame when burying a buffer in a dedicated
1492 frame, or quitting a window showing a buffer in a frame of its own.
1494 *** New commands `maximize-window' and `minimize-window'.
1495 These maximize and minimize the size of a window within its frame.
1497 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1498 These functions allow to navigate through the live buffers that have
1499 been shown in a specific window.
1501 ** Minibuffer changes
1503 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1504 This is handy for minibuffer-only frames, and is also used for the feature
1505 where mouse-1 pops up *Messages*"', which can now easily be changed.
1507 *** Minibuffers set `truncate-lines' to nil.
1508 If you want to change the value to something else, you could use
1509 for example `minibuffer-setup-hook'.
1511 ** `auto-mode-case-fold' is now enabled by default.
1513 ** `backup-by-copying-when-mismatch' now defaults to t.
1515 ** New basic faces `error', `warning', `success'.
1516 These are used to highlight text indicating failure, caution or
1517 successful operation.
1519 ** New option `list-colors-sort' defines the color sort order
1520 for `list-colors-display'.
1522 ** The variable `focus-follows-mouse' now always defaults to nil.
1525 * Editing Changes in Emacs 24.1
1529 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1530 `isearch-yank-line'.
1532 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1533 `isearch-yank-kill'.
1535 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1537 ** New commands `count-words-region' and `count-words'.
1539 *** M-= is bound to `count-words-region', not `count-lines-region'.
1540 The `count-words-region' command, when called interactively, reports
1541 the number of lines, words, and characters in the region. It is a
1542 superset of the old `count-lines-region', which is now an obsolete
1545 ** The command `just-one-space' (M-SPC), if given a negative argument,
1546 also deletes newlines around point.
1550 *** New option `delete-active-region'.
1551 If non-nil, [delete] and DEL delete the region if it is active and no
1552 prefix argument is given. If set to `kill', those commands kill
1555 *** New command `delete-forward-char', bound to [delete].
1556 This is meant for interactive use, and obeys `delete-active-region'.
1557 The command `delete-char' does not obey `delete-active-region'.
1559 *** `delete-backward-char' is now a Lisp function.
1560 Apart from obeying `delete-active-region', its behavior is unchanged.
1561 However, the byte compiler now warns if it is called from Lisp; Lisp
1562 callers should use delete-char with a negative argument instead.
1564 *** The option `mouse-region-delete-keys' has been deleted.
1566 ** Selection changes.
1568 The default handling of clipboard and primary selections has been
1569 changed to conform with modern X applications. In short, most
1570 commands for killing and yanking text now use the clipboard, while
1571 mouse commands use the primary selection.
1573 In the following, we provide a list of these changes, followed by a
1574 list of steps to get the old behavior back if you prefer that.
1576 *** `select-active-regions' now defaults to t.
1577 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1578 the kill ring. The selected text is put in the primary selection, if
1579 the system possesses a separate primary selection facility (e.g. X).
1581 **** `select-active-regions' also accepts a new value, `only'.
1582 This means to only set the primary selection for temporarily active
1583 regions (usually made by mouse-dragging or shift-selection);
1584 "ordinary" active regions, such as those made with C-SPC followed by
1585 point motion, do not alter the primary selection.
1587 **** `mouse-drag-copy-region' now defaults to nil.
1589 *** mouse-2 is now bound to `mouse-yank-primary'.
1590 This pastes from the primary selection, ignoring the kill-ring.
1591 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1593 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1595 *** `x-select-enable-primary' now defaults to nil.
1596 Thus, commands that kill text or copy it to the kill-ring (such as
1597 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1599 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1600 exactly equivalent to M-w, C-w, and C-y respectively.
1602 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1603 non-nil by default, as Windows does not support the primary selection
1604 between applications.
1606 *** To return to the previous behavior, do the following:
1608 **** Change `select-active-regions' to nil.
1609 **** Change `mouse-drag-copy-region' to t.
1610 **** Change `x-select-enable-primary' to t (on X only).
1611 **** Change `x-select-enable-clipboard' to nil.
1612 **** Bind `mouse-yank-at-click' to mouse-2.
1614 *** Support for X cut buffers has been removed.
1616 *** X clipboard managers are now supported.
1617 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1619 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1620 in the current rectangle. With a prefix argument, this prompts for a
1621 number to count from and for a format string.
1623 ** `redisplay-dont-pause' now defaults to t.
1624 This makes Emacs feel more responsive to editing commands that arrive
1625 at high rate, e.g. if you lean on some key, because stopping redisplay
1626 in the middle (when this variable is nil) forces more expensive
1627 updates later on, and Emacs appears to be unable to keep up.
1629 ** The behavior of <TAB> for active regions in Text mode has changed.
1630 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1631 when the region is active causes Emacs to indent all the lines in the
1632 region, aligning them with the line previous to the first line in the
1633 region (or with the left margin if there is no previous line).
1635 ** When `occur' is called with a prefix argument, matching strings are
1636 collected into the `*Occur*' buffer without line numbers. If there
1637 are parenthesized subexpressions in the specified regexp, `occur'
1638 reads replacement text that may contain \\& and \\N whose convention
1639 follows `replace-match'.
1642 * Changes in Specialized Modes and Packages in Emacs 24.1
1644 ** Archive Mode has basic support for browsing and updating 7z archives.
1648 *** BibTeX mode now supports biblatex.
1649 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1650 `bibtex-entry-field-alist' is now an obsolete alias for
1651 `bibtex-BibTeX-entry-alist'.
1653 *** New command `bibtex-search-entries', bound to C-c C-a.
1655 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1657 *** New variable `bibtex-search-entry-globally'.
1661 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1663 *** The default browser used by the package is now the "xdg-open" program,
1664 on platforms that support it. This calls your desktop's preferred browser.
1668 *** Support for musical notes.
1670 *** Support for logarithmic units.
1672 *** No longer uses the tex prefix for TeX specific unit names when
1673 using TeX or LaTeX mode.
1675 *** New option to highlight selections using faces.
1677 *** `calc-histogram' has the option of using a vector to determine the bins.
1679 *** New "O" option prefix.
1681 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
1683 ** Calendar, Diary, and Appt
1685 *** Diary entries can contain non-printing "comments".
1686 See the variable `diary-comment-start'.
1688 *** Appointments can specify their individual warning times.
1689 See the variable `appt-warning-time-regexp'.
1691 *** The function specified by `appt-disp-window-function' may be passed
1692 lists of arguments if multiple appointments are due at similar times.
1693 If you are using a custom function for this, you should update it.
1695 *** New function `diary-hebrew-birthday'.
1697 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1698 may no longer be nil, but must all be strings.
1700 *** The obsolete (since Emacs 22.1) method of enabling the appt
1701 package by adding `appt-make-list' to `diary-hook' has been removed.
1702 Use `appt-activate' instead.
1704 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1705 appt-issue-message (use the function appt-activate)
1706 appt-visible/appt-msg-window (use the variable appt-display-format)
1708 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1709 view-diary-entries, list-diary-entries, show-all-diary-entries
1713 *** New feature to "guess" the style in an existing buffer.
1714 The main entry point is M-x c-guess.
1716 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1718 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1719 Thus C-M-a will, by default, go to the beginning of the immediate function,
1722 *** "Macros with semicolons" can be registered for correct indentation.
1723 Where such a macro ends a line (no semicolon) the next statement is no longer
1724 parsed as a statement continuation.
1726 ** Comint and modes derived from it use the standard completion code.
1730 *** Compilation mode can be used without Font Lock mode.
1731 `compilation-parse-errors-function' is now obsolete.
1733 *** New variable `compilation-filter-start', which is bound while
1734 `compilation-filter-hook' runs. It records the start position of the
1735 text inserted by `compilation-filter'.
1737 *** `compilation-error-screen-columns' and `compilation-first-column'
1738 are obeyed in the editing buffer. So programming language modes can
1739 set them, whereas previously only the value in the *Compilation*
1744 *** Customize buffers now contain a search field.
1745 The search is performed using `customize-apropos'.
1746 To turn off the search field, set `custom-search-field' to nil.
1748 *** Options in customize group buffers start out hidden if not customized.
1749 Use the arrow to the left of the option name to toggle visibility.
1751 *** custom-buffer-sort-alphabetically now defaults to t.
1753 *** The color widget now has a "Choose" button, which allows you to
1754 choose a color via `list-colors-display'.
1758 *** It is now possible to access buses other than the default system
1761 *** The `dbus-register-method' and `dbus-register-property' functions
1762 optionally do not register names.
1764 *** The new function `dbus-register-service' registers a known service
1765 name on a D-Bus without also registering a property or a method.
1769 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1770 if called with a prefix argument, read a file name from the minibuffer
1771 instead of using the current buffer.
1773 *** The "dired local variables" feature of Dired-x is obsolete.
1774 The standard directory local variables feature replaces it.
1778 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1779 controlling attempts to autojoin a channel.
1781 *** New variable `erc-coding-system-precedence': If we use `undecided'
1782 as the server coding system, this variable will then be consulted.
1783 The default is to decode strings that can be decoded as utf-8 as
1784 utf-8, and do the normal `undecided' decoding for the rest.
1788 *** The default value of `eshell-directory-name' has changed
1789 to be an "eshell" directory in `user-emacs-directory'.
1790 The old "~/.eshell/" directory is still used if it exists, though.
1794 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1795 It now supports multithread non-stop debugging and simultaneous
1796 debugging of several threads.
1800 *** RET (`image-toggle-animation') toggles animation, if applicable.
1801 Animation plays once, unless the option `image-animate-loop' is non-nil.
1805 *** New command M-x info-display-manual displays a named Info manual.
1806 If that manual is already visited in some Info buffer, it displays
1807 that buffer. (This is handy if you have many manuals in many *info*
1808 buffers, and don't remember the name of the buffer visiting the manual
1809 you want to consult.) Otherwise, it loads and displays the manual.
1811 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1812 This is for compatibility with the stand-alone Info reader program,
1813 and also because `Info-edit' is a rarely used command that is disabled
1816 ** Mail mode changes (not Message mode)
1818 *** New command M-x mail-add-attachment for adding MIME attachments
1820 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1821 (Its name is misleading, since it has nothing to do with MIME
1822 attachments.) The old name is now an obsolete alias to the new name.
1824 ** MH-E has been updated to MH-E version 8.3.1.
1825 See MH-E-NEWS for details.
1827 ** Modula-2 mode provides auto-indentation.
1829 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1831 ** nXML mode no longer binds C-RET to `nxml-complete'.
1832 Completion is now performed via `completion-at-point', bound to C-M-i
1833 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1834 default), this performs tag completion.
1836 ** Org mode has been updated to version 7.8.09.
1837 See ORG-NEWS for details.
1839 ** Prolog mode has been completely revamped, with lots of additional
1840 functionality such as more intelligent indentation, electricity,
1841 support for more variants, including Mercury, and a lot more.
1845 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1846 in the Rmail incoming message.
1848 *** The variable `rmail-message-filter' no longer has any effect.
1849 This change was made in Emacs 23.1 but was not advertised at the time.
1850 Try using `rmail-show-message-hook' instead.
1854 *** M-x shell prompts for the shell path name if the default directory
1855 is a remote file name and neither the environment variable $ESHELL nor
1856 the variable `explicit-shell-file-name' is set.
1858 *** TAB is now bound to the standard `completion-at-point' command,
1859 which now implements the pcomplete rules for shell command completion.
1863 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1864 if the mail server supports them. This uses either built-in GnuTLS
1865 support, or the starttls.el library. Customize `smtpmail-stream-type'
1868 *** The variable `smtpmail-auth-credentials' has been removed.
1869 By default, the information is now stored in the file ~/.authinfo.
1870 This was the default value of smtpmail-auth-credentials. If you had
1871 customized smtpmail-auth-credentials to a list of user names and
1872 passwords, those settings are not used. During your first connection
1873 to the smtp server, Emacs will prompt for the user name and password,
1874 and offer to save them to ~/.authinfo. Or you can manually copy the
1875 credentials to ~/.authinfo. For example, if you had
1877 (setq smtpmail-auth-credentials
1878 '(("mail.example.org" 25 "jim" "s!cret")))
1880 then the equivalent line in ~/.authinfo would be
1882 machine mail.example.org port 25 login jim password s!cret
1884 See the auth-source manual for more information, e.g. on encrypting
1885 the credentials file.
1887 *** The variable `smtpmail-starttls-credentials' has been removed.
1888 If you had that set, you need to put
1890 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1892 in your ~/.authinfo file instead.
1894 *** SMTPmail defaults to using the address in the From: header as the
1895 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1896 to the address you wish to use instead.
1900 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1901 and `sql-oracle-scan-on'.
1903 *** New options controlling prompting for login parameters.
1904 Each supported product has a custom variable `sql-*-login-params',
1905 which is a list of the parameters to be prompted for before a
1906 connection is established.
1908 *** The command `sql-product-interactive' now takes a prefix argument,
1909 which causes it to prompt for an SQL product.
1911 *** Product-specific SQL interactive commands now take prefix arguments.
1912 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1913 given a prefix argument, prompt for a name for the SQL interactive
1914 buffer. This reduces the need for calling `sql-rename-buffer'.
1916 *** SQL interactive modes suppress command continuation prompts, and
1917 replace tabs with spaces. The first change impacts multiple line SQL
1918 statements entered with C-j between each line, statements yanked into
1919 the buffer and statements sent with `sql-send-*' functions. The
1920 second prevents the MySQL and Postgres interpreters from listing
1921 object name completions when sent text via `sql-send-*' functions.
1923 *** New command `sql-connect' starts a predefined SQLi session,
1924 using the login parameters from `sql-connection-alist'.
1926 *** New "Save Connection" menu item in SQLi buffers.
1927 This gathers the login params specified for the SQLi session, if it
1928 was not started by a connection, and saves them as a new connection.
1930 *** New commands for listing database objects and details:
1931 sql-list-all and sql-list-table.
1933 *** An API for manipulating SQL product definitions has been added.
1937 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1941 *** New inline access method "ksu" (kerberized su).
1943 *** The following access methods are discontinued: "ssh1_old",
1944 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1946 *** The user option `remote-file-name-inhibit-cache' controls whether
1947 remote file attributes are cached for better performance.
1949 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1950 default value to "".
1952 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1953 for remote machines which support SELinux.
1955 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1956 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1957 the degree of parallelism.
1959 ** VC and related modes
1961 *** Support for pulling on distributed version control systems.
1962 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1963 supported (currently with Bzr, Git, and Mercurial), to update the
1964 current branch and working tree. A prefix argument means to prompt
1965 the user for specifics, e.g. a pull location.
1967 *** `vc-update' is now an alias for `vc-pull'.
1969 *** Support for merging on distributed version control systems.
1970 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1971 is supported (currently with Bzr, Git, and Mercurial), to merge
1972 changes from another branch into the current one. It prompts for
1973 specifics, e.g. a merge source.
1975 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1976 shows a diff while querying the user. It defaults to t.
1978 *** Log entries in some Log View buffers can be toggled to display a
1979 longer description by typing RET (log-view-toggle-entry-display).
1980 This is currently supported for Bzr, Git, and Mercurial (to support
1981 another backend, define a `log-view-expanded-log-entry-function').
1982 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1983 use this to display the full log entry for the revision at point.
1985 *** New command `vc-ediff' allows visual comparison of two revisions
1986 of a file similar to `vc-diff', but using ediff backend.
1988 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1989 this was not advertised at the time.
1991 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1992 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1993 this was not advertised at the time.
1999 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2001 *** partial-completion-mode (complete.el) is obsolete.
2002 You can get a comparable behavior with:
2003 (setq completion-styles '(partial-completion initials))
2004 (setq completion-pcm-complete-word-inserts-delimiters t)
2006 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2008 *** pgg is obsolete (use EasyPG instead).
2010 *** sregex.el is obsolete, since rx.el is a strict superset.
2012 *** s-region.el and pc-select.el are obsolete.
2013 They are superseded by shift-select-mode, enabled by default since 23.1.
2015 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2019 *** The Landmark game is now invoked with `landmark', not `lm'.
2020 Its functions and variables have been similarly renamed.
2022 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2023 (This interfered with cua-mode.)
2025 *** f90.el has some support for Fortran 2008 syntax.
2027 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2029 *** New command `nato-region' converts text to NATO phonetic alphabet.
2032 * New Modes and Packages in Emacs 24.1
2034 ** Occur Edit mode applies edits made in *Occur* buffers to the
2035 original buffers. It is bound to "e" in Occur mode.
2037 ** New global minor mode electric-pair-mode.
2038 When enabled, typing an open parenthesis automatically inserts the
2039 matching closing one.
2041 ** New global minor mode electric-indent-mode.
2042 When enabled, typing certain characters triggers reindentation.
2043 Major modes wishing to use this can set electric-indent-chars or
2044 electric-indent-functions.
2046 ** New global minor mode electric-layout-mode.
2047 When enabled, typing certain characters automatically inserts newlines.
2048 Major modes wishing to use this can set electric-layout-rules.
2050 ** tabulated-list.el provides a generic major mode for tabulated data,
2051 from which other modes can be derived.
2053 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2055 ** secrets.el is an implementation of the Secret Service API, an
2056 interface to password managers like GNOME Keyring or KDE Wallet. The
2057 Secret Service API requires D-Bus for communication. The command
2058 `secrets-show-secrets' offers a buffer with a visualization of the
2061 ** notifications.el provides an implementation of the Desktop
2062 Notifications API. It requires D-Bus for communication.
2064 ** soap-client.el supports access to SOAP web services from Emacs.
2065 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2067 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2069 ** New emacs-lock.el package.
2070 The previous version has been moved to obsolete/old-emacs-lock.el.
2071 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2072 against exiting Emacs and killing the buffer can be set separately.
2073 The mechanism for automatically turning off protection for buffers
2074 with dead inferior processes has been generalized.
2077 * Incompatible Lisp Changes in Emacs 24.1
2079 ** Passing a nil argument to a minor mode function call now ENABLES
2080 the minor mode unconditionally. This is so that you can write e.g.
2082 (add-hook 'text-mode-hook 'foo-mode)
2084 to enable foo-mode in Text mode buffers, removing the need for
2085 `turn-on-foo-mode' style functions. This affects all mode commands
2086 defined by `define-minor-mode'. If called interactively, the mode
2087 command still toggles the minor mode.
2089 ** The return value of `backup-buffer' has changed.
2090 It is now a list of three elements, where the second element is a list
2091 describing the original file's SELinux context. If Emacs or the
2092 system lacks SELinux support, the context list is (nil nil nil nil).
2093 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2095 ** `char-direction-table' and the `char-direction' function were deleted.
2096 They were buggy and inferior to the new support of bidirectional
2097 editing introduced in Emacs 24. If you need the bidirectional
2098 properties of a character, use `get-char-code-property' with the last
2099 argument `bidi-class'.
2101 ** `copy-directory' now copies the source directory as a subdirectory
2102 of the target directory, if the latter is an existing directory. The
2103 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2104 the contents directly into a pre-existing target directory.
2106 ** For mouse click input events in the text area, the Y pixel
2107 coordinate in the POSITION list now counts from the top of the text
2108 area, excluding any header line. Previously, it counted from the top
2111 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2112 been further reduced. Now a backquote not followed by a space is
2113 always treated as a "new-style" backquote. Please remove all
2114 "old-style" backquotes from your code. If your code uses backquotes
2115 as documented in the Elisp manual, and compiles without warning, then
2116 you have nothing to do in this regard. Code not following the
2117 appropriate conventions may fail to compile.
2119 The most common cause of trouble seems to be an old-style backquote
2120 followed by a newline. Another cause of trouble is vector notation
2121 for key sequence notation: instead of [(control ,)] and [(control ')],
2122 you should write [(control ?,)] and [(control ?')], which will work in
2125 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2126 was not advertised at the time. The function `custom-initialize-delay'
2127 replaced all known uses.
2129 ** `view-buffer' now treats special mode-class in the same way that
2130 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2131 major mode is special).
2133 ** Menu and tool bar changes
2135 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2136 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2137 With these alist entries omitted, `make-frame' checks the value of the
2138 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2139 a menu-bar or tool-bar, respectively. If the alist entries are added,
2140 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2142 *** The menu bar bindings's caches are not used any more.
2143 Use (where-is-internal <def> nil t) instead.
2145 ** Regions created by mouse dragging are now normal active regions,
2146 similar to those created by shift-selection (see Selection changes
2147 above). In previous Emacs versions, these regions were delineated by
2148 `mouse-drag-overlay'; that variable has been removed.
2150 ** The fourth argument of `filter-buffer-substring' has been removed.
2151 If you want to remove text properties from the final result, simply
2152 pass the result through substring-no-properties.
2154 ** cl.el no longer provides `cl-19'.
2156 ** The following obsolete functions and aliases have been removed
2157 (the appropriate new function is given in parentheses; "not needed"
2158 means you can just remove all calls to the function in question):
2160 *** `comint-kill-output' (`comint-delete-output')
2161 *** `decompose-composite-char' (`char-to-string')
2162 *** `outline-visible' (`outline-invisible-p')
2163 *** `internal-find-face' (`facep')
2164 *** `internal-get-face' (`facep and check-face')
2165 *** `frame-update-faces' (not needed)
2166 *** `frame-update-face-colors' (`frame-set-background-mode')
2167 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2168 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2169 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2170 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2171 *** `x-make-font-unbold' (`make-face-unbold')
2172 *** `x-make-font-unitalic' (`make-face-unitalic')
2173 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2174 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2175 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2176 *** `char-bytes' (== 1)
2177 *** `isearch-return-char' (`isearch-printing-char')
2178 *** `make-local-hook' (not needed)
2179 *** `set-screen-height' (`set-frame-height')
2180 *** `set-screen-width' (`set-frame-width')
2182 ** The following obsolete variables and varaliases have been removed
2183 (the appropriate new variable is given in parentheses):
2185 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2186 *** `vc-header-alist' (`vc-BACKEND-header')
2187 *** `directory-sep-char' (== ?/)
2188 *** `font-lock-defaults-alist' (`font-lock-defaults')
2189 *** `e' (`float-e').
2191 ** The following obsolete files were removed:
2192 sc.el, x-menu.el, rnews.el, rnewspost.el
2194 ** The format of the finder-inf.el file has changed, since the Finder
2195 mechanism is now based on the package system. The variable
2196 `finder-package-info' is replaced by `package--builtins' and
2197 `finder-keywords-hash'.
2199 ** When generating autoloads, `update-directory-autoloads' no longer
2200 assumes every inspected file is in your `load-path'. It instead
2201 generates relative names according to the current `load-path'.
2204 * Lisp changes in Emacs 24.1
2206 ** Code can now use lexical scoping by default instead of dynamic scoping.
2207 The `lexical-binding' variable enables lexical scoping for local
2208 variables. It is typically set via a file-local variable in the first
2209 line of the file, in which case it applies to all the code in that
2212 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2213 binding instead of the old dynamic binding mode.
2215 *** Lexically scoped interpreted functions are represented with a new form
2216 of function value which looks like (closure ENV ARGS &rest BODY).
2218 *** New macro `letrec' to define recursive local functions.
2220 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2221 So do `defcustom' and other forms that call `defvar' as a subroutine.
2223 *** New function `special-variable-p' to check whether a variable is
2224 declared as dynamically bound.
2226 *** The form ((lambda ...) ...) is deprecated.
2228 ** An Emacs Lisp testing tool is now included.
2229 Emacs Lisp developers can use this tool to write automated tests for
2230 their code. See the ERT info manual for details.
2232 ** Changes for bidirectional display and editing
2234 *** New function `current-bidi-paragraph-direction'.
2235 This returns the base direction of the paragraph at point.
2237 *** New function `bidi-string-mark-left-to-right'.
2238 Given a string containing characters from right-to-left scripts, this
2239 function returns another string which can be safely inserted into a
2240 buffer, such that any following text will be always displayed to the
2241 right of that string. (This works by appending an invisible Unicode
2242 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2244 This is useful when the buffer has overall left-to-right paragraph
2245 direction and you need to insert a string whose contents are not known
2246 in advance, without disrupting the layout of the line.
2250 *** Window tree functions are accessible in Elisp.
2251 Functions are provided to return the parent, siblings or child windows
2252 of any window including internal windows (windows not associated with a
2253 buffer) in the window tree.
2255 **** New function `window-valid-p' gives non-nil for live and internal
2258 **** Window manipulation can deal with internal windows.
2259 Many window handling functions like `split-window', `delete-window', or
2260 `delete-other-windows' as well as the window resizing functions can now
2261 act on any window including internal ones.
2263 *** window-total-height/-width vs window-body-height/-width.
2264 The function `window-height' has been renamed to `window-total-height'
2265 and `window-width' has been renamed to `window-body-width'. The old
2266 names are provided as aliases. Two new functions `window-total-width'
2267 and `window-body-height' are provided.
2269 *** Window parameters specific to window handling functions.
2270 For each window you can specify a parameter to override the default
2271 behavior of a number of functions like `split-window', `delete-window'
2272 and `delete-other-windows'. The variable `ignore-window-parameters'
2273 allows to ignore processing such parameters.
2275 *** New semantics of third argument of `split-window'.
2276 The third argument of `split-window' has been renamed to SIDE and can be
2277 set to any of the values 'below, 'right, 'above, or 'left to make the
2278 new window appear on the corresponding side of the window that shall be
2279 split. Any other value of SIDE will cause `split-window' to split the
2280 window into two side-by-side windows as before.
2282 *** Window resizing functions.
2283 A new standard function for resizing windows called `window-resize' has
2284 been introduced. This and all other functions for resizing windows no
2285 longer delete any windows when they become too small.
2287 *** Deleting the selected window now selects the most recently selected
2288 live window on that frame instead.
2290 *** `adjust-window-trailing-edge' adjustments.
2291 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2292 is able to resize other windows if a window adjacent to the trailing
2293 edge cannot be shrunk any more. This makes its behavior more similar to
2294 that of Emacs 21 without compromising, however, its inability to delete
2295 windows which was introduced in Emacs 22.
2297 *** Window-local buffer lists.
2298 Windows now have local buffer lists. This means that removing a buffer
2299 from display in a window will preferably show the buffer previously
2300 shown in that window with its previous window-start and window-point
2301 positions. This also means that the same buffer may be automatically
2302 shown twice even if it already appears in another window.
2304 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2305 which if non-nil requires the buffer to be displayed in the currently
2306 selected window, signaling an error otherwise. If nil, another window
2307 can be used, e.g. if the selected one is strongly dedicated.
2309 *** `split-window-vertically' and `split-window-horizontally' renamed
2310 to `split-window-below' and `split-window-right' respectively.
2311 The old names are kept as aliases.
2315 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2316 named ACTION, and takes a display action of the same form as
2317 `display-buffer-base-action' (see Changes, above). A non-nil,
2318 non-list value is treated specially, as the old meaning.
2320 **** New variable `display-buffer-overriding-action'.
2322 **** The procedure of `display-buffer' etc. to choose a window is
2323 determined by combining `display-buffer-overriding-action',
2324 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2325 and `display-buffer-fallback-action'. The second and fourth of these
2326 are user-customizable variables.
2328 See the docstring of `display-buffer' for details.
2330 *** New functions `window-state-get' and `window-state-put'.
2331 These functions allow to save and restore the state of an arbitrary
2332 frame or window as an Elisp object.
2336 *** New variable `completion-extra-properties' used to specify extra
2337 properties of the current completion:
2338 - :annotate-function, same as the old completion-annotate-function.
2339 - :exit-function, function to call after completion took place.
2341 *** Functions on `completion-at-point-functions' can return any of the
2342 properties valid for `completion-extra-properties'.
2344 *** `completion-annotate-function' is obsolete.
2346 *** New `metadata' method for completion tables. The metadata thus returned
2347 can specify various details of the data returned by `all-completions':
2348 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2349 used to select a style in completion-category-overrides.
2350 - `annotation-function' to add annotations in *Completions*.
2351 - `display-sort-function' to specify how to sort entries in *Completions*.
2352 - `cycle-sort-function' to specify how to sort entries when cycling.
2354 *** `minibuffer-local-filename-must-match-map' is not used any more.
2355 Instead, the bindings in `minibuffer-local-filename-completion-map'
2356 are combined with `minibuffer-local-must-match-map'.
2358 *** New variable `completing-read-function' allows overriding the
2359 behavior of `completing-read'.
2361 ** `glyphless-char-display' can now distinguish between graphical and
2362 text terminal display, via a char-table entry that is a cons cell.
2364 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2365 Instead, the offending function is removed.
2369 *** New function `run-hook-wrapped' for running an abnormal hook by
2370 passing the hook functions as arguments to a "wrapping" function.
2371 Like `run-hook-with-args-until-success', it stops at the first
2372 non-nil return value.
2374 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2375 set of "wrapping" filters, similar to around advice.
2376 (A version of this macro was actually added in Emacs 23.2 but was not
2377 advertised at the time.)
2381 *** New macro `condition-case-unless-debug' (this was actually added in
2382 Emacs 23.1 as condition-case-no-debug, but not advertised)
2384 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2386 *** Variable `stack-trace-on-error' removed.
2388 *** The debugger can now "continue" from an error, which means it will
2389 jump to the error handler as if the debugger had not been invoked
2390 instead of jumping all the way to the top-level.
2392 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2393 This can be useful when `inhibit-quit' is set.
2395 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2396 named Emacs server instances.
2398 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2399 to redirect STDOUT to a file.
2401 ** The function `format-time-string' now supports the %N directive,
2402 for higher-resolution time stamps.
2404 ** New input reading functions
2406 *** New function `read-char-choice' reads a restricted set of
2407 characters, discarding any inputs not inside the set.
2409 *** The command `read-color' now requires a match for a color name
2410 or RGB triplet, instead of signaling an error if the user provides
2413 **** `facemenu-read-color' is now an alias for `read-color'.
2415 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2416 The variable is now used to load all kind of supported dynamic libraries,
2417 not just image libraries. The previous name is still available as an
2420 ** Syntax parsing changes
2422 *** New variable `syntax-propertize-function'.
2423 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2424 This allows syntax-table properties to be set independently from font-lock:
2425 just call syntax-propertize to make sure the text is propertized.
2426 Together with this new variable come a new hook
2427 syntax-propertize-extend-region-functions, as well as two helper functions:
2428 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2429 as-is; and syntax-propertize-rules which provides a new way to specify
2432 *** Syntax tables support a new "comment style c" additionally to style b.
2434 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2436 ** frame-local variables cannot be let-bound any more.
2438 ** Major and minor mode changes
2440 *** `set-auto-mode' now respects mode: local variables at the end of files,
2441 as well as those in the -*- line.
2443 *** `prog-mode' is a new major mode from which programming modes
2446 **** `prog-mode-hook' can be used to enable features for programming
2447 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2448 on-the-fly spell checking for comments and strings.
2450 *** New hook `change-major-mode-after-body-hook', run by
2451 `run-mode-hooks' just before any other mode hooks.
2453 *** Enabled globalized minor modes can be disabled in specific major modes.
2454 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2455 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2457 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2459 ** File-handling changes
2461 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2462 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2463 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2464 argument is supplied (see Trash changes, above).
2466 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2468 ** Tool-bars can display separators.
2469 Tool-bar separators are handled like menu separators in menu-bar maps,
2470 i.e. via menu entries of the form `(menu-item "--")'.
2474 *** Animated images support (currently animated gifs only).
2476 **** `image-animated-p' returns non-nil if an image can be animated.
2478 **** `image-animate' animates a supplied image spec.
2480 **** `image-animate-timer' returns the timer object for an image that
2483 *** `image-extension-data' has been renamed to `image-metadata'.
2484 The old name is an obsolete alias to the new one.
2486 *** Image mode can view any image type that ImageMagick supports.
2487 This requires Emacs to be built with ImageMagick support.
2489 **** New function `imagemagick-types', defined if ImageMagick support
2490 is enabled, returns a list of image file extensions that your
2491 ImageMagick installation supports.
2493 **** New function `imagemagick-register-types' enables ImageMagick
2494 image types in Image mode and in `create-image' and other helper
2497 **** New option `imagemagick-types-inhibit' excludes certain
2498 ImageMagick image types from `imagemagick-register-types'.
2500 **** With ImageMagick support, there are extra Image mode commands to
2501 resize and rotate images: `image-transform-fit-to-height',
2502 `image-transform-fit-to-width', `image-transform-set-rotation', and
2503 `image-transform-set-scale'.
2505 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2506 passes it to the mail user agent function. This argument specifies an
2507 action for returning to the caller after finishing with the mail. For
2508 example, this is used by Rmail to optionally delete a mail window.
2510 ** XML and HTML parsing
2511 If Emacs is compiled with libxml2 support, there are two new
2512 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2513 and `libxml-parse-xml-region' (which parses XML). Both return an
2514 Emacs Lisp parse tree.
2516 ** Networking and encryption changes
2518 *** `open-network-stream' can now be used to open an encrypted stream.
2519 It now accepts an optional `:type' parameter for initiating a TLS
2520 connection, directly or via STARTTLS. To do STARTTLS, additional
2521 parameters (`:end-of-command', `:success', `:capabilities-command')
2522 must also be supplied.
2524 *** New library gnutls.el.
2525 The new function `gnutls-available-p' returns non-nil if Emacs is
2526 built with GnuTLS support. The main entry points are
2527 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2528 these functions through `open-network-stream', because that can
2529 upgrade connections through STARTTLS opportunistically or use plain
2530 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2533 *** New primitive `secure-hash' that supports many secure hash algorithms:
2534 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2535 sha1.el has been removed. The `sha1' feature is provided by default.
2539 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2541 ** Progress reporters can now "spin".
2542 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2543 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2544 time you call `progress-reporter-update' on that progress reporter,
2545 with a nil or omitted VALUE argument, the reporter message is
2546 displayed with a "spinning bar".
2548 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2549 being reverted, even if the buffer has a local `revert-buffer-function'.
2551 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2552 If delayed-warnings-list is non-nil, the command loop calls
2553 `delayed-warnings-hook' after `post-command-hook'. At present, this
2554 is only used by Emacs on some platforms to display warnings during
2555 startup, which might otherwise not be noticed. This uses the
2556 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2558 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2560 ** New function `make-composed-keymap' that constructs a new keymap
2561 from multiple input maps. You can use this to make a keymap that
2562 inherits from multiple maps, eg:
2563 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2565 ** New function `string-prefix-p'.
2566 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2568 ** New reader macro ## that stands for the empty symbol.
2569 This means that the empty symbol can now be read back. Also, #: by itself
2570 (when not immediately followed by a possible symbol character) stands for
2571 an empty uninterned symbol.
2573 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2575 ** The following functions and variables are obsolete:
2577 *** `tooltip-use-echo-area' is obsolete.
2578 Rather than setting this to t, disable Tooltip mode instead.
2580 *** buffer-substring-filters is obsolete.
2581 Use `filter-buffer-substring-functions' instead.
2583 *** `byte-compile-disable-print-circle' is obsolete.
2585 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2586 Use `post-command-hook' instead.
2588 *** `font-lock-maximum-size' is obsolete.
2591 * Changes in Emacs 24.1 on non-free operating systems
2593 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2594 and also when HOME is set to C:\ by default.
2596 ** New configure.bat options
2598 *** --enable-checking builds Emacs with extra runtime checks.
2600 *** --distfiles specifies files to be included in binary distribution.
2602 *** --without-gnutls disables automatic GnuTLS detection.
2604 *** --lib for general library linkage, works with the USER_LIBS build variable.
2606 ** New make target `dist' to create binary distribution for MS Windows.
2608 ** The Lisp function `w32-default-color-map' is now obsolete.
2609 (It is only used internally in the Emacs C code.)
2611 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2612 reappear on mouse-over. (Requires OS X 10.6 or later.)
2614 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2615 other platforms, rather than inserting its contents into the buffer.
2618 ----------------------------------------------------------------------
2619 This file is part of GNU Emacs.
2621 GNU Emacs is free software: you can redistribute it and/or modify
2622 it under the terms of the GNU General Public License as published by
2623 the Free Software Foundation, either version 3 of the License, or
2624 (at your option) any later version.
2626 GNU Emacs is distributed in the hope that it will be useful,
2627 but WITHOUT ANY WARRANTY; without even the implied warranty of
2628 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2629 GNU General Public License for more details.
2631 You should have received a copy of the GNU General Public License
2632 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2637 paragraph-separate: "[
\f]*$"