Most of this change is to boilerplate commentary such as license URLs.
This change was prompted by ftp://ftp.gnu.org's going-away party,
planned for November. Change these FTP URLs to https://ftp.gnu.org
instead. Make similar changes for URLs to other organizations moving
away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and
fsf.org when this works, as this will further help defend against
man-in-the-middle attacks (for this part I omitted the MS-DOS and
MS-Windows sources and the test tarballs to keep the workload down).
HTTPS is not fully working to lists.gnu.org so I left those URLs alone
for now.
This patch should not change behavior. It typically omits backslashes
where they are redundant (e.g., in the string literal "^\$").
In a few places, insert backslashes where they make regular
expressions clearer: e.g., replace "^\*" (equivalent to "^*") with
"^\\*", which has the same effect as a regular expression.
Also, use ‘\ %’ instead of ‘\%’ when avoiding confusion with SCCS IDs,
and similarly use ‘\ $’ instead of ‘\$’ when avoiding confusion with
RCS IDs, as that makes it clearer that the backslash is intended.
(m4-mode): Use it.
(m4--quoted-p): New function.
(m4-font-lock-keywords): Don't handle #..\n comments any more.
(m4-mode-syntax-table): Use punctuation syntax (according to m4 manual)
for most special characters.
Change all regexps to use things like \_< and \_>.
* lisp/progmodes/ada-mode.el (ada-mode-abbrev-table): Consolidate declaration.
(ada-mode-syntax-table, ada-mode-symbol-syntax-table): Initialize in
the declaration.
(ada-create-syntax-table): Remove.
(ada-capitalize-word): Don't mess with the syntax of "_" since it
already has the right syntax nowadays.
(ada-goto-next-word): Don't change the syntax of "_".
* lisp/progmodes/autoconf.el (autoconf-definition-regexp)
(autoconf-font-lock-keywords, autoconf-current-defun-function):
Handle a _ with symbol syntax.
(autoconf-mode): Don't change the syntax-table for imenu and font-lock.
* lisp/progmodes/vera-mode.el (vera-underscore-is-part-of-word):
* lisp/progmodes/prolog.el (prolog-underscore-wordchar-flag)
(prolog-char-quote-workaround):
* lisp/progmodes/cperl-mode.el (cperl-under-as-char):
* lisp/progmodes/vhdl-mode.el (vhdl-underscore-is-part-of-word):
Mark as obsolete.
(vhdl-mode-syntax-table, vhdl-mode-ext-syntax-table): Initialize in
their declaration.
(vhdl-mode-syntax-table-init): Remove.
* lisp/progmodes/ld-script.el (ld-script-mode-syntax-table): Use symbol
syntax for "_".
(ld-script-font-lock-keywords):
Change regexps to use things like \_< and \_>.
* lisp/progmodes/m4-mode.el (m4-mode-syntax-table): Add comment on last change.
* lisp/font-lock.el (lisp-font-lock-keywords-2): Don't highlight obsolete
with-wrapper-hook.
* lisp/mh-e/mh-comp.el (mh-regexp-in-field-p): Minor simplification.
* lisp/progmodes/m4-mode.el (m4-program): Assume it is in PATH.
(m4-mode-syntax-table): Init in the defvar.
(m4-mode-abbrev-table): Let define-derived-mode define it.
Suggested by Jari Aalto.
* lisp/emacs-lisp/lisp-mode.el (lisp-current-defun-name): New.
(lisp-mode-variables): Use it.
* lisp/progmodes/cc-mode.el (c-common-init):
* lisp/progmodes/cperl-mode.el (cperl-mode): Set a value for
add-log-current-defun-function.
* lisp/progmodes/m4-mode.el (m4-current-defun-name): New function.
(m4-mode): Use it.
* lisp/progmodes/perl-mode.el (perl-current-defun-name): New.
(perl-mode): Use it.
* lisp/progmodes/scheme.el (scheme-mode-variables, dsssl-mode): Use
lisp-current-defun-name.
* lisp/textmodes/tex-mode.el (tex-current-defun-name): New.
(tex-common-initialization): Use it.
* lisp/textmodes/texinfo.el (texinfo-current-defun-name): New.
(texinfo-mode): Use it.
* lisp/vc/add-log.el (add-log-current-defun-function): Doc fix.
(add-log-current-defun): Move mode-specific code to other files.
(add-log-lisp-like-modes, add-log-c-like-modes)
(add-log-tex-like-modes): Variables deleted.
Fixes: debbugs:2224
(m4-start-m4): New function.
(m4-end-m4): New function.
(m4-m4-buffer, m4-m4-region): Now use m4-start-m4.
(m4-font-lock-keywords): Collaps 4 regex's into 1.
