Use this in C, C++, and Objective C Modes. Fixes bug#22246
* src/syntax.c (comment-end-can-be-escaped): New buffer local variable.
(forw-comment, back-comment): On encountering an end of comment character,
test whether it is escaped when `comment-end-can-be-escaped' is non-nil.
* doc/lispref/syntax.texi (Control Parsing): Describe
`comment-end-can-be-escaped'.
* etc/NEWS (Lisp Changes): Describe `comment-end-can-be-escaped'.
* lisp/progmodes/cc-langs.el: New c-lang-setvar `comment-end-can-be-escaped'.
* lisp/progmodes/project.el (project-library-roots): Rename to
project-external-roots.
(project-library-roots-function): Rename to
project-vc-external-roots-function. Only use it in the VC
backend, for now. Update project-external-roots accordingly.
(project-vc-library-roots): Remove.
(project-or-libraries-find-regexp):
Rename to project-or-external-find-regexp.
* lisp/progmodes/elisp-mode.el (elisp-library-roots):
Rename to elisp-load-path-roots.
* lisp/progmodes/etags.el (etags-library-roots): Remove. Use
an anonymous function for the default value of
project-vc-external-roots-function.
* lisp/erc/erc-backend.el (erc-process-sentinel): Clear channel user
lists upon disconnection. This prevents invalid channel
user lists when reconnecting (bug#10947).
* erc-backend.el (erc-server-send-ping): If the server has
closed connection, this may already have been detected and
`erc-server-last-received-time' has been set to nil (bug#13608).
* lisp/erc/erc.el (erc-channel-receive-names): Fix errors
generated when multiple IRC clients talk to a single IRC proxy
(bug#19034).
Backport:
(cherry picked from commit 507e98a54d)
* lisp/erc/erc-backend.el (erc-server-setup-periodical-ping): Checks
for existing timers in the alist before adding new ones. If a
timer already exists, it is cancelled and
overwritten. (bug#19292).
* lisp/net/imap.el (imap-ssl-program): Remove (bug#21134).
(imap-starttls-open): Use open-network-stream instead of starttls.el.
(imap-tls-open): Use open-network-stream instead of tls.el.
* lisp/textmodes/artist.el (artist-figlet-get-font-list-windows):
New function.
(artist-figlet-choose-font): Use it on MS-Windows and MS-DOS.
(Bug#20167)
This is a work-around to prevent the compiler from using semantic
knowledge about malloc for optimization purposes. E.g., gcc 5.2
with -O2 replaces most of calloc's definition by a call to calloc;
see Bug#22085.
* src/gmalloc.c [!HYBRID_MALLOC] (malloc, realloc, calloc)
(aligned_alloc, free): Do not undef. Instead, define these as
functions (perhaps renamed to gmalloc etc.) in terms of gmalloc etc.
* lisp/net/browse-url.el (browse-url)
(browse-url-default-browser, browse-url-default-windows-browser)
(browse-url-default-macosx-browser, browse-url-chromium)
(browse-url-kde, browse-url-text-xterm): Clarify the usage of ARGS
and NEW-WINDOW arguments in these functions. (Bug#19421)
* src/eval.c (unbind_to): Redo so that the FALLTHROUGH!! comment
becomes accurate again. This shouldn’t affect behavior.
(backtrace_eval_unrewind): Apply the recent unbind_to fix here, too.
* test/lisp/url/url-parse-tests.el: Add tests covering url-generic-parse-url.
* test/lisp/url/url-expand-tests.el: Add tests covering url-expand-file-name.
* lisp/url/url-parse.el (url-generic-parse-url): Keep empty fragment
information in URL-struct.
* lisp/url/url-parse.el (url-path-and-query): Do not artificially turn empty
path and query into nil path and query, respectively.
* lisp/url/url-expand.el (url-expander-remove-relative-links): Do not turn
empty path into an absolute ("/") path.
* lisp/url/url-expand.el (url-expand-file-name): Properly resolve
fragment-only URIs. Do not just return them unchanged.
* lisp/url/url-expand.el (url-default-expander): An empty path in the relative
reference URI should not drop the last segment.
Backport:
(cherry picked from commit b792ecea17)
* lisp/url/url-http.el (url-user-agent): Move from here...
* lisp/url/url-vars.el (url-user-agent): ...to here. This is to
keep all the URL defcustoms in one place, and also have it defined
whenever the URL library is loaded.
* doc/misc/url.texi (Customization): Document 'url-user-agent'.
* lisp/progmodes/sh-script.el (sh-mode, sh-set-shell): Document
the 'sh-shell' file-local variable.
(top level): Add an auto-load form to avoid byte-compiler warning
about 'comint-send-string'.
* lisp/url/url-handlers.el: Add autoload cookie so that
`package-list-packages' doesn't bug out (bug#21927) (tiny change)
Backport:
(cherry picked from commit 7a7b5b492f)
* lisp/startup.el (normal-top-level): On MS-Windows, convert
backslashes to forward slashes while decoding default-directory
of the initially-created buffers.
* eww.el (eww-setup-buffer): Always save history, even when
called from outside the eww buffer (bug#19638).
Backport:
(cherry picked from commit 2a0f18d9b6)
* eww.el (eww-mode): Most web pages are left-to-right, so make
that the default (bug#19801).
* shr.el (shr-tag-html): Respect "dir" attributes
(left-to-right, right-to-left).
Backport:
(cherry picked from commit 9e089ec8a3)
