Update copyright for years from Emacs 21 to present (mainly adding

[bpt/emacs.git] / lispref / buffers.texi

diff --git a/lispref/buffers.texi b/lispref/buffers.texi
index 55e41e6..a0c2d1a 100644 (file)
--- a/lispref/buffers.texi
+++ b/lispref/buffers.texi
@@ -1,7 +1,7 @@
 @c -*-texinfo-*-
 @c This is part of the GNU Emacs Lisp Reference Manual.
-@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2002, 2003,
-@c   2004, 2005, 2006 Free Software Foundation, Inc.
+@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2001, 2002,
+@c   2003, 2004, 2005, 2006, 2007  Free Software Foundation, Inc.
 @c See the file elisp.texi for copying conditions.
 @setfilename ../info/buffers
 @node Buffers, Windows, Backups and Auto-Saving, Top
@@ -484,7 +484,7 @@ correspond to the new file name, unless the new name is already in
 use.
 
 If @var{filename} is @code{nil} or the empty string, that stands for
-``no visited file''.  In this case, @code{set-visited-file-name} marks
+``no visited file.''  In this case, @code{set-visited-file-name} marks
 the buffer as having no visited file, without changing the buffer's
 modified flag.
 
@@ -573,7 +573,6 @@ Don't use this function in programs, since it prints a message in the
 echo area; use @code{set-buffer-modified-p} (above) instead.
 @end deffn
 
-@c Emacs 19 feature
 @defun buffer-modified-tick &optional buffer
 This function returns @var{buffer}'s modification-count.  This is a
 counter that increments every time the buffer is modified.  If
@@ -581,6 +580,17 @@ counter that increments every time the buffer is modified.  If
 The counter can wrap around occasionally.
 @end defun
 
+@defun buffer-chars-modified-tick &optional buffer
+This function returns @var{buffer}'s character-change modification-count.
+Changes to text properties leave this counter unchanged; however, each
+time text is inserted or removed from the buffer, the counter is reset
+to the value that would be returned @code{buffer-modified-tick}.
+By comparing the values returned by two @code{buffer-chars-modified-tick}
+calls, you can tell whether a character change occurred in that buffer
+in between the calls.  If @var{buffer} is @code{nil} (or omitted), the
+current buffer is used.
+@end defun
+
 @node Modification Time
 @comment  node-name,  next,  previous,  up
 @section Comparison of Modification Time