* textmodes/two-column.el (2C-split, 2C-merge):

* textmodes/two-column.el (2C-split, 2C-merge):
* textmodes/bib-mode.el (bib-find-key, mark-bib):
* progmodes/idlw-shell.el (idlwave-shell-move-or-history):
* progmodes/etags.el (find-tag-in-order, etags-tags-apropos)
* progmodes/ada-xref.el (ada-get-all-references):
* obsolete/mlsupport.el (ml-next-line, ml-previous-line):
* emulation/vi.el (vi-previous-line-first-nonwhite)
(vi-effective-range, vi-put-before):
* emulation/edt.el (edt-next-line, edt-previous-line)
(edt-paragraph-forward): Use forward-line.

* progmodes/etags.el (tags-apropos): Require apropos at compile
time too.

* progmodes/prolog.el: Require comint when compiling.
(inferior-prolog-flavor): Move defvar before use.