* lisp/files.el (interpreter-mode-alist): Add mksh.
* lisp/progmodes/sh-script.el (sh-ancestor-alist): Add mksh, a pdksh
derivative.
(sh-alias-alist): Alias /system/bin/sh (Android's system shell) to
mksh. Improve custom spec; allow regular expressions.
(sh-shell): Delegate name splitting to `sh-canonicalize-shell'.
(sh-after-hack-local-variables): New function.
(sh-mode): Use it; respect file-local `sh-shell' variable.
(sh-set-shell): Use `sh-canonicalize-shell' instead of open-coding
the normalization.
(sh-canonicalize-shell): Rewrite to support regexes.
Fixes: debbugs:17333
* window.el (with-temp-buffer-window): Don't make BUFFER-OR-NAME
current (Bug#16816, Bug#17007).
(with-current-buffer-window): New macro doing the same as
`with-temp-buffer-window' but with BUFFER-OR-NAME current.
* help.el (help-print-return-message): Warn in doc-string to not
use this in `with-help-window'.
(describe-bindings-internal): Call `describe-buffer-bindings'
from within help buffer. See Juanma's scenario in (Bug#16816).
(with-help-window): Update doc-string.
* dired.el (dired-mark-pop-up):
* files.el (save-buffers-kill-emacs):
* register.el (register-preview): Use `with-current-buffer-window'
instead of `with-temp-buffer-window'.
* display.texi (Temporary Displays): Rewrite descriptions of
`with-output-to-temp-buffer' and `with-temp-buffer-window'.
* help.texi (Help Functions): Rewrite description of
`with-help-window'.
Mark as obsolete and replace it with a symbol property.
(byte-compile-form): Use new 'interactive-only property.
* lisp/comint.el, lisp/files.el, lisp/replace.el, lisp/simple.el:
Apply new 'interactive-only properly.
Cf http://lists.gnu.org/archive/html/emacs-devel/2005-08/msg00472.html
* lisp/files.el (interpreter-mode-alist): Convert to regexps.
(set-auto-mode): Adapt for this.
* lisp/progmodes/cperl-mode.el (cperl-clobber-mode-lists):
Comment out unused variable.
* lisp/progmodes/cc-mode.el (interpreter-mode-alist):
* lisp/progmodes/python.el (interpreter-mode-alist):
* lisp/progmodes/ruby-mode.el (interpreter-mode-alist): Convert to regexps.
* lisp/progmodes/sh-script.el (sh-set-shell):
No longer use interpreter-mode-alist to get list of shells.
* etc/NEWS: Mention this.
Fixes: debbugs:15306
(dir-locals-read-from-file): Remove unused `err' variable.
(hack-dir-local-variables--warned-coding): New var.
(hack-dir-local-variables): Use it to avoid repeated warnings.
(make-backup-file-name--default-function): New function.
(make-backup-file-name-function): Use it as default.
(buffer-stale--default-function): New function.
(buffer-stale-function): Use it as default.
(revert-buffer-insert-file-contents--default-function): New function.
(revert-buffer-insert-file-contents-function): Use it as default.
(insert-directory): Avoid add-to-list.
* lisp/autorevert.el (auto-revert-handler): Simplify.
Use buffer-stale--default-function.
* lisp/files.el (save-buffers-kill-terminal):
* lisp/net/browse-url.el (browse-url):
* lisp/server.el (server-save-buffers-kill-terminal):
* lisp/textmodes/reftex-toc.el (reftex-toc, reftex-toc-revert):
Prefer nil to selected-frame for the first arg of frame-parameter.
(revert-buffer-preserve-modes): Declare var to
provide access to the `preserve-modes' argument.
(revert-buffer): Let-bind it.
(revert-buffer--default): New function, extracted from revert-buffer.
* doc/lispref/text.texi (Undo):
Document (t . 0) and (t . -1) in buffer-undo-list.
* etc/NEWS: Changes to visited-file-modtime, set-visited-file-modtime.
* lisp/files.el (clear-visited-file-modtime): Move here from fileio.c.
* src/atimer.c (schedule_atimer):
* src/fileio.c (Ffile_newer_than_file_p):
Minor cleanup: use EMACS_TIME_LT so that we can remove EMACS_TIME_GT.
* src/buffer.c (buffer-undo-list): Document (t . 0) and (t . -1).
* src/fileio.c (Fclear_visited_file_modtime): Move to lisp/files.el.
(syms_of_fileio): Remove Sclear_visited_file_name.
(Fvisited_file_modtime): Return -1, not (-1 ...), when the visited
file doesn't exist; this avoids an ambiguity with negative timestamps.
(Fset_visited_file_modtime): Accept -1 and 0 as time-list arg.
* src/systime.h (make_emacs_time, invalid_emacs_time):
Don't assume struct timespec layout; POSIX doesn't guarantee it.
(EMACS_TIME_NE, EMACS_TIME_GT, EMACS_TIME_GE): Remove.
* src/undo.c (record_first_change): Push (visited-file-modtime) onto
undo list rather than reimplementing it by hand, incorrectly.
Fixes: debbugs:14824
