Merge remote-tracking branch 'savannah/master' into HEAD

* lisp/emacs-lisp/comp.el (comp-never-optimize-functions): Add yes-or-no-p

Fix type-checking bug in vertical-motion

* src/indent.c (Fvertical_motion): Fix bug where the type of lcols
was checked too late.

* src/indent.c (Fvertical_motion): Fix int/Lisp_Object mix up.

; * lisp/files.el (directory-files-no-dot-files-regexp): Arg name.

Use directory-files-no-dot-files-regexp wherever possible

Suggested by Paul Eggert.

* lisp/files.el (directory-files-no-dot-files-regexp):
Clarify semantics and purpose.
* lisp/dired.el (dired-re-no-dot):
Define as obsolete alias of directory-files-no-dot-files-regexp.
(dired-delete-file):
* lisp/gnus/gnus-util.el (gnus-delete-directory):
* lisp/net/ange-ftp.el (ange-ftp-delete-directory):
* lisp/obsolete/vc-arch.el (vc-arch-trim-revlib):
* lisp/org/ob-core.el (org-babel-remove-temporary-directory):
* lisp/vc/vc-rcs.el (vc-rcs-unregister):
Use directory-files-no-dot-files-regexp.

Quote semanticdb-ebrowse-default-file-name in regexp

Noticed by Andreas Schwab.

* lisp/cedet/semantic/db-ebrowse.el (semanticdb-load-ebrowse-caches):
Quote file name in regexp.

Fix bugs, inefficiencies and bad style in regexps

Found by relint.  See discussion at
https://lists.gnu.org/archive/html/emacs-devel/2020-04/msg00265.html

* lisp/org/org-table.el (org-table-finish-edit-field):
* lisp/arc-mode.el (archive-rar-summarize):
Avoid wrapped subsumption in repeated sequences.
* lisp/erc/erc-dcc.el (erc-dcc-ctcp-query-send-regexp): Replace
inefficient repeated empty-matching expression with a plain greedy
form.
(erc-dcc-handle-ctcp-send): Adjust group numbers.
* lisp/net/puny.el (puny-encode-domain): Fix fast-path shortcut
pattern so that it actually works as intended.
* lisp/progmodes/gdb-mi.el (gdb-control-commands-regexp):
* lisp/vc/diff-mode.el (diff-imenu-generic-expression):
Remove superfluous backslashes.
* lisp/progmodes/scheme.el (scheme-imenu-generic-expression):
Correct confused definition-matching pattern which would match more
than intended.
* lisp/textmodes/sgml-mode.el (sgml-tag-name-re): Avoid inefficient
matching by using the fact that the first character cannot match the
last char of sgml-name-re.

Regularise some file-matching regexps

* admin/authors.el (authors-obsolete-files-regexps)
(authors-renamed-files-regexps): Replace ^ and $ with \` and \'.

Avoid compiler warning in indent.c

* src/indent.c (Fvertical_motion): Avoid compilation warning.
Reported by Juanma Barranquero <lekktu@gmail.com>.

; * src/w32image.c (w32_select_active_frame): Comment about GUID values.

File-handling cleanup in w32image.c

* src/w32image.c (w32_load_image): Encode the image file name and
convert it via 'map_w32_filename'.  No need to do anything special
when 'w32_unicode_filenames' is zero, since file names are in
UTF-8 internally, and this code will never run on Windows 9X.
* src/w32.h (map_w32_filename): Add prototype; removed prototypes
from all *.c files.

* lisp/subr.el (eval-after-load): Make use of load-true-file-name bug#40638

Fix retrieval of frame delay when using GDI+

* src/w32image.c (enum PropertyItem_type): New enumeration.
(decode_delay): New function.
(w32_frame_delay): Call 'decode_delay' to retrieve the frame delay
from image data.

Merge from origin/emacs-27

a5f7c26907 (origin/emacs-27) * admin/authors.el: Add an author alias.
d87a4d1f4e Limit RLIMIT_NOFILE to FD_SETSIZE on macOS
e5ca8e5e73 Fix Elisp manual entry on 'set-window-configuration'
485f24223f ; Update ChangeLog.3
8f200254fb ; Update etc/AUTHORS
c7adc851ad * admin/authors.el: Add missing author aliases.
4acdd7fe58 Fix edge case errors in filename-matching regexps
5f36e21fe5 Clarify the doc string of 'yank'
13301d4266 New function erc-track-switch-buffer-other-window
38f7538d8f New function erc-switch-to-buffer-other-window

# Conflicts:
# etc/NEWS

Fix small glitches in documenting the native image API feature

* etc/NEWS: Fix wording of the entry for native image API support.
Reported by Juanma Barranquero <lekktu@gmail.com>.

* configure.ac (native-image-api): Fix the "--help" description.

Avoid infloop in redisplay when wrap-prefix is too wide

* src/xdisp.c (move_it_to): Avoid infloop due to wrap-prefix that
is wide enough to leave no space to display even the first
character of the continuation line.  (Bug#40632)

* admin/authors.el: Add an author alias.

Limit RLIMIT_NOFILE to FD_SETSIZE on macOS

* src/nsterm.m ([EmacsApp applicationDidFinishLaunching:]): Call
CoreFoundation functions that increase RLIMIT_NOFILE behind our back
during startup, and then set RLIMIT_NOFILE back to FD_SETSIZE to avoid
crashes in setup_process_coding_system  (Bug#39164).

Fix Elisp manual entry on 'set-window-configuration'

* doc/lispref/windows.texi (Window Configurations): Fix
description of 'set-window-configuration'.

* lisp/htmlfontify.el: Use `font-lock-ensure` unconditionally

Remove redundant `:group`s.

(hfy-force-fontification): Make it an obsolete alias for `font-lock-ensure`.
Update all callers.
(hfy-init-kludge-hooks, hfy-init-kludge-hook): Remove vars, not used any more.
(hfy-kludge-cperl-mode): Declare it obsolete.

Avoid compiler warning in image.c

* src/image.c (image_can_use_native_api): Avoid compiler warnings
by making this function conditioned on HAVE_NATIVE_IMAGE_API.
(initialize_image_type): Call image_can_use_native_api only if
HAVE_NATIVE_IMAGE_API is non-zero.  Reported by Basil
L. Contovounesios <contovob@tcd.ie>.

Merge remote-tracking branch 'savannah/master' into HEAD

Always set `load-true-file-name' where `load-file-name' is set too.

Fix bug#40620.

* lisp/cus-dep.el (custom-make-dependencies): Set
load-true-file-name.

* lisp/emacs-lisp/package.el (package-quickstart-refresh):
Likewise.

* lisp/international/mule.el (load-with-code-conversion):
Likewise.

* lisp/loadup.el (load-true-file-name): Likewise.

; Update ChangeLog.3

; Update etc/AUTHORS

* admin/authors.el: Add missing author aliases.

; * src/image.c: Cleanup of #ifdef's related to HAVE_NATIVE_IMAGE_API.

Make use of MS-Windows native image API be selectable at run time

* configure.ac: Minor cleanup in how w32image.o is added to the
build when native image APIs are requested.

* src/w32gui.h (w32_load_image, w32_can_use_native_image_api)
(w32_gdiplus_shutdown): Move prototypes from w32term.h here, since
w32.c doesn't include w32term.h.
* src/image.c (struct image_type): No need to pass TYPE to the
'valid_p' method.  All callers changed.
(initialize_image_type) [HAVE_NATIVE_IMAGE_API]: Call
'image_can_use_native_api' before trying image-specific methods.
(image_can_use_native_api): New function.
(image_types): Remove the native_image_type parts.
(syms_of_image): New symbol 'native-image'.
(parse_image_spec): Accept native-image "type" for any image type.
* src/w32term.c (syms_of_w32term): New variable
'w32-use-native-image-API'.
* src/w32image.c: (w32_can_use_native_image_api): New function.
(gdiplus_init): Rename from w32_gdiplus_startup. Simplify code.
Move the call to GdiplusStartup to a separate function.  Use
ordinal number for SHCreateMemStream if cannot load it by name.
(w32_load_image): Ignore Win32Error status from
w32_select_active_frame.
Move DEFSYMs from here...
* src/image.c (syms_of_image) [HAVE_NATIVE_IMAGE_API]: ...to here.

* etc/NEWS: Update the entry about native image API use.

Fix edge case errors in filename-matching regexps

These changes fix actual or latent bugs in regexps that match
file names, such as PATTERN arguments to 'directory-files'.  See
https://lists.gnu.org/archive/html/emacs-devel/2020-04/msg00265.html

* admin/authors.el (authors-obsolete-files-regexps)
(authors-renamed-files-regexps):
* lisp/auth-source-pass.el (auth-source-pass-entries):
* lisp/calendar/todo-mode.el (todo-show, todo-find-filtered-items-file)
(todo-filter-items, todo-reset-nondiary-marker, todo-reset-done-string)
(todo-reset-comment-string, todo-reset-highlight-item):
* lisp/cedet/semantic/db-ebrowse.el (semanticdb-load-ebrowse-caches):
* lisp/cedet/semantic/texi.el (semantic-texi-associated-files):
* lisp/cedet/srecode/map.el (srecode-map-update-map):
* lisp/dired.el (dired-re-no-dot):
* lisp/emacs-lisp/autoload.el (update-directory-autoloads):
* lisp/emacs-lisp/shadow.el (load-path-shadows-find):
* lisp/files.el (auto-mode-alist, directory-files-no-dot-files-regexp):
* lisp/finder.el (finder-compile-keywords):
* lisp/generic-x.el (inetd-conf-generic-mode, named-boot-generic-mode)
(resolve-conf-generic-mode, etc-modules-conf-generic-mode):
* lisp/gnus/gnus-agent.el (gnus-agent-read-agentview)
(gnus-agent-regenerate-group, gnus-agent-update-files-total-fetched-for):
* lisp/gnus/gnus-cache.el (gnus-cache-articles-in-group):
* lisp/gnus/gnus-score.el (gnus-score-search-global-directories):
* lisp/gnus/gnus-util.el (gnus-delete-directory):
* lisp/gnus/gnus-uu.el (gnus-uu-dir-files):
* lisp/gnus/nndraft.el (nndraft-request-group):
* lisp/gnus/nnmh.el (nnmh-request-group, nnmh-request-create-group):
(nnmh-request-delete-group, nnmh-active-number, nnmh-update-gnus-unreads):
* lisp/gnus/nnspool.el (nnspool-request-group):
* lisp/gnus/spam-stat.el (spam-stat-process-directory)
(spam-stat-test-directory):
* lisp/help-fns.el (help-fns--first-release):
* lisp/help.el (view-emacs-news):
* lisp/international/quail.el (quail-update-leim-list-file):
* lisp/international/titdic-cnv.el (batch-titdic-convert):
* lisp/mail/mspools.el (mspools-set-vm-spool-files)
(mspools-get-spool-files):
* lisp/mail/rmail.el (rmail-secondary-file-regexp)
(rmail-speedbar-match-folder-regexp):
* lisp/net/ange-ftp.el (ange-ftp-delete-directory):
* lisp/net/tramp.el (tramp-use-absolute-autoload-file-names):
* lisp/obsolete/gulp.el (gulp-send-requests):
* lisp/obsolete/vc-arch.el (vc-arch-trim-revlib):
* lisp/org/ob-core.el (org-babel-remove-temporary-directory):
* lisp/progmodes/ebnf2ps.el (ebnf-file-suffix-regexp, ebnf-style-database):
* lisp/progmodes/executable.el (executable-command-find-posix-p):
* lisp/startup.el (command-line):
* lisp/textmodes/refer.el (refer-get-bib-files):
* lisp/url/url-about.el (url-probe-protocols):
* lisp/vc/vc-rcs.el (vc-rcs-register, vc-rcs-unregister):
* test/lisp/net/tramp-archive-tests.el
(tramp-archive-test19-directory-files-and-attributes):
* test/lisp/net/tramp-tests.el (tramp-test19-directory-files-and-attributes):
Replace ^ and $ with \` and \', respectively.
Use (rx (or (not ".") "...")), translated into "[^.]\\|\\.\\.\\.",
to match anything but "." and "..", instead of several incorrect
regexps.

* lisp/emacs-lisp/comp.el (native-compile-async): Better error message.

Initial version of native image API support for MS-Windows

* src/w32image.c: New file.
* src/w32term.h: Add prototypes of 'w32_load_image',
'w32_gdiplus_startup', 'w32_gdiplus_shutdown', and
'w32_query_frame_background_color'.
* src/w32term.c (w32_query_frame_background_color): No longer
static.
* src/w32.c (term_ntproc) [HAVE_GDIPLUS]: Call
'w32_gdiplus_shutdown'.
* src/image.c (struct image_type) <valid_p>: Accept an additional
argument, the image type.  All implementations changed.
(init_native_image_functions, native_image_p, native_image_load)
[HAVE_NATIVE_IMAGE_API]: New methods for "native image type".
(initialize_image_type) [HAVE_NATIVE_IMAGE_API]: Call
'init_native_image_functions'.
(image_types) [HAVE_NATIVE_IMAGE_API]: Add settings for native
image API.
(lookup_image_type) [HAVE_NATIVE_IMAGE_API]: Initialize native
functions if needed.

* lisp/term/w32-win.el (dynamic-library-alist): Add gdiplus and
shlwapi.

* etc/NEWS: Announce the new feature.

* configure.ac (native-image-api): New option, OFF by default.
(HAVE_NATIVE_IMAGE_API): If native-image-api is selected, add
w32image.o to W32_OBJ.

Clarify the doc string of 'yank'

* lisp/simple.el (yank): Mention 'current-kill' in the doc string,
so that people could find all the gory details of what is "the most
recent kill" for this purpose.  (Bug#40375)

New function erc-track-switch-buffer-other-window

* lisp/erc/erc-track.el (erc-track-switch-buffer): Factor out the
implementation from here ...
(erc-track--switch-buffer): ... to here.
(erc-track-switch-buffer-other-window): New function, like
`erc-track-switch-buffer', but uses `switch-to-buffer-other-window'
instead, to open the buffer in another window.

New function erc-switch-to-buffer-other-window

* lisp/erc/erc.el (erc-switch-to-buffer): Factor out the buffer choice
implementation from here ...
(erc--switch-to-buffer): ... to here.
(erc-switch-to-buffer-other-window): New function, like
`erc-switch-to-buffer', but uses `switch-to-buffer-other-window'
instead, to open the buffer in another window.

Fix hi-lock test and add new test for unhighlight (bug#40337)

* lisp/hi-lock.el (hi-lock-unface-buffer): Use hi-lock--hashcons
only on strings, not lists.

* test/lisp/hi-lock-tests.el (hi-lock-bug26666): Revert previous change,
use "a" instead of "b".
(hi-lock-unhighlight): New test.

* lisp/vc/vc.el (vc-deduce-fileset): Improve docstring (bug#34949).

* lisp/emacs-lisp/comp.el (comp-finalize-relocs): Better commentary.

* Fix native-compile-async for bug#40602.

* lisp/emacs-lisp/comp.el (native-compile-async): Relax coherency condition.

Merge remote-tracking branch 'savannah/master' into HEAD

* src/lread.c (Fload): Clean-up unnecessary sanity check.

'is_native_elisp' can't be non zero if NATIVE_COMP_FLAG is not set.

Fix function find mechanism for installed instance.

* src/lread.c (parent_directory): New function.
(Fload): Make use of 'parent_directory' and fix load-history
build-up with relative paths.

Merge from origin/emacs-27

f84aed5fd2 (origin/emacs-27) Clarify documentation on inhibit-modific...

; Merge from origin/emacs-27

The following commit was skipped:

81d07da788 gnus-shorten-url: Improve and avoid args-out-of-range error

Merge from origin/emacs-27

1dfc497fac Minor wording change in Introduction to Programming in Ema...
ff09b4eeac Fix 'flymake-show-diagnostics-buffer' when line numbers ar...
63e8d0ea87 Fix last changes describing mail commands
01212a762f Do setup Flymake in file-less Elisp buffers
36873ef2b2 Fix error message for ‘cl-struct-unknown-slot’ (bug#39995)
3f9310b0fe Fix and improve documentation of mail-related features
1482a75efa Fix build failure with Fx_gtk_debug
cf57663f2a Mention jit-lock deferred as an alternative to fast-but-im...

# Conflicts:
# etc/NEWS

* doc/lispref/processes.texi (Network): Fix xref usage.

* doc/emacs/msdos.texi (Windows Keyboard): Fix xref.

Fix previous change in w32fns.c

* src/w32fns.c (w32_msg_pump): Simplify by not calling
ImmGetOpenStatus.
(Fw32_get_ime_open_status): Fix a typo.

Document the new 'w32-get/set-ime-open-status' functions

* doc/emacs/msdos.texi (Windows Keyboard): Document
'w32-set-ime-open-status'.

* etc/NEWS: Announce the new IME-related functions.

; Fix last change.

Support toggling native Input Methods on MS-Windows

* src/w32term.h (WM_EMACS_IME_STATUS): New message code.

* src/w32fns.c (ImmGetOpenStatus_Proc, ImmSetOpenStatus_Proc): New
typedefs.
(w32_msg_pump): Handle the WM_EMACS_IME_STATUS message.
(Fw32_get_ime_open_status, Fw32_set_ime_open_status): New functions
(syms_of_w32fns): Defsubr them.
(globals_of_w32fns): Load ImmGetOpenStatus and ImmSetOpenStatus
from IMM2.DLL.

Clarify documentation on inhibit-modification-hooks intended usage

Cf. bug#40332 and the discussion at
https://lists.gnu.org/archive/html/emacs-devel/2020-03/msg00921.html

* doc/lispref/text.texi (Change Hooks):
* src/insdel.c (syms_of_insdel): Clarify the intended usage of
'inhibit-modification-hooks'.

gnus-shorten-url: Improve and avoid args-out-of-range error

'gnus-shorten-url' (used by 'gnus-summary-browse-url') ignored
fragment identifiers and didn't check substring bounds, in some cases
leading to runtime errors, e.g.:

  (gnus-shorten-url "https://some.url.with/path/and#also_a_long_target" 40)
  ;; => Lisp error: (args-out-of-range "/path/and" -18 nil)

This commit makes it account for #fragments and fixes faulty string
computation, reusing existing helper function.  (bug#39980)

* lisp/vc/ediff-init.el (ediff-truncate-string-left): Rename to
'string-truncate-left' and move...
* lisp/emacs-lisp/subr-x.el (string-truncate-left):  ...here.
All callers changed.
* lisp/gnus/gnus-sum.el (gnus-shorten-url): Fix args-out-of-range
error, don't drop #fragments, use 'string-truncate-left'.

* src/lread.c (Fload): Add comment.

gnus-shorten-url: Improve and avoid args-out-of-range error

'gnus-shorten-url' (used by 'gnus-summary-browse-url') ignored
fragment identifiers and didn't check substring bounds, in some cases
leading to runtime errors, e.g.:

  (gnus-shorten-url "https://some.url.with/path/and#also_a_long_target" 40)
  ;; => Lisp error: (args-out-of-range "/path/and" -18 nil)

This commit makes it account for #fragments and fixes faulty string
computation.  (bug#39980)

Do not merge to master, where the helper is put to subr-x.el.

* lisp/gnus/gnus-sum.el (gnus--string-truncate-left): New helper
function (copied from 'ediff-truncate-string-left').
(gnus-shorten-url): Use it and don't drop #fragments.

Merge remote-tracking branch 'savannah/master' into HEAD

Revert "Fix org for eln new compilation folder layout"

This reverts commit f77f6ca77054ca6122df2742345710b7493ad293.

Introduce load-true-file-name

* src/comp.c (maybe_defer_native_compilation): Use
`load-true-file-name' instead of `load-file-name'.

* src/lread.c (Fload, end_of_file_error, read1, read_list)
(init_lread, syms_of_lread): Add new `load-true-file-name' and
fake `load-file-name' value when loading .eln files.

Fix last change

* lisp/mail/rmail.el (rmail-simplified-subject): A prefix can have
up to 4 characters, not 3.

Minor wording change in Introduction to Programming in Emacs Lisp

* doc/lispintro/emacs-lisp-intro.texi (Prevent confusion): Mention
that dynamic scoping is only the default in Emacs Lisp, not the
only scoping rule.  (Bug#40594)

Improve support of "Re:" in Rmail

* lisp/mail/rmail.el (rmail-simplified-subject)
(rmail-reply-regexp): Recognize U+FF1A FULLWIDTH COLON as a colon
after "Re:"-type prefixes.
(rmail-re-abbrevs): New defcustom with localized abbreviations of
"Re:".
(rmail-reply-regexp): Use 'rmail-re-abbrevs'.  Recognize U+FF1A
in addition to the ASCII colon.

* etc/NEWS: Call out the new defcustom 'rmail-re-abbrevs'.

Fix 'flymake-show-diagnostics-buffer' when line numbers are displayed

* lisp/progmodes/flymake.el (flymake--diagnostics-buffer-entries):
Do nothing if 'flymake--diagnostics-buffer-source' is not a
buffer.  (Bug#40529)

Fix hi-lock test and add new test for case-fold (bug#40337)

* lisp/hi-lock.el (hi-lock--regexps-at-point): Handle font-lock faces.
(hi-lock-unface-buffer): Simplify default value handling.
(hi-lock-set-pattern): Add either lighter or regexp to
hi-lock-interactive-lighters.
(hi-lock-set-pattern): Put overlay prop hi-lock-overlay-regexp to
either lighter or regexp.

* test/lisp/hi-lock-tests.el (hi-lock-bug26666): Use "b" instead of "a".
(hi-lock-case-fold): New test.

Fix bootstrap compiler warnings about `read-library-name'

Introduced by

2020-03-28T22:16:28+01:00!stepnem@gmail.com
2c45091791 (load-library, locate-library: Use read-library-name)

Thanks to Juanma Barranquero <lekktu@gmail.com> for reporting.

* lisp/files.el:
* lisp/subr.el: Declare 'read-library-name'.

Fix last changes describing mail commands

* doc/emacs/sending.texi (Sending Mail): Fix the description of
the behavior of 'C-x m' without prefix argument.  (Bug#40561)

Fix error in 'call-process-region' when START is nil (Bug#40576)

* src/callproc.c (Fcall_process_region): Fix behavior when START is
nil and DELETE is non-nil.

* test/src/callproc-tests.el
(call-process-region-entire-buffer-with-delete): New unit test.

; * test/src/callproc-tests.el: Fix checkdoc errors.

Merge remote-tracking branch 'savannah/master' into HEAD

* src/pdumper.c (dump_do_dump_relocation): Optimize native dump load.

Check just once if is a local build or Emacs got installed.

Implement working make install for native build.

Set invocation variables during dump load.

Vinvocation_directory must be set during dump load process to support
.eln load.

* src/pdumper.h: (pdumper_load): Add argv0 and original_pwd
parameters.

* src/pdumper.c (pdumper_load): Add argv0 and original_pwd
parameter plus call 'set_invocation_vars'.

* src/lisp.h (set_invocation_vars): New function.

* src/emacs.c (set_invocation_vars): New function.
(init_cmdargs): Move logic into 'set_invocation_vars' and call it.
(load_pdump): Add 'original_pwd' parameter and update calls to
'pdumper_load'.
(main): Set emacs_wd earlier and update call to 'pdumper_load'.

Implement position independent dump.

Set the filename for every compilation unit as realtive to obtain a
position independent dump.

* lisp/loadup.el: Modify filename for every compilation unit as
position independent.

* src/pdumper.c (dump_do_dump_relocation): Update to be invocation
directory relative.

Do setup Flymake in file-less Elisp buffers

Fixes: bug#40573
* lisp/progmodes/elisp-mode.el (emacs-lisp-mode): Change
condition for setting flymake-diagnostic-functions.

Fix error message for ‘cl-struct-unknown-slot’ (bug#39995)

* lisp/emacs-lisp/cl-macs.el (cl-struct-unknown-slot): Remove spurious
format specifiers.

* src/comp.c (native-comp-unit-set-file): New function.

* src/comp.c (native-comp-unit-file): Better parameter name.

Also use named functions for the ‘gv’ declare forms (Bug#40491)

* lisp/emacs-lisp/gv.el (gv--expander-defun-declaration)
(gv--setter-defun-declaration): New helper functions; use them.

Use named functions in {defun,macro}-declarations-alist (Bug#40491)

* lisp/emacs-lisp/byte-run.el (byte-run--set-advertised-calling-convention)
(byte-run--set-obsolete, byte-run--set-interactive-only)
(byte-run--set-pure, byte-run--set-side-effect-free)
(byte-run--set-compiler-macro, byte-run--set-doc-string)
(byte-run--set-indent, byte-run--set-debug)
(byte-run--set-no-font-lock-keyword): New helper functions.
(defun-declarations-alist, macro-declarations-alist): Use them.

Fix a bootstrap issue with unescaped character literal detection.

* src/lread.c (load_warn_unescaped_character_literals): Deal with the
case that 'byte-run--unescaped-character-literals-warning' isn't yet
defined.

Fix and improve documentation of mail-related features

* lisp/simple.el (compose-mail): Clarify the effect of the
CONTINUE argument.
* lisp/mail/sendmail.el (mail-from-style): Update the RFC value in
the obsolescence warning text.

* doc/emacs/sending.texi (Sending Mail): Fix the description of
the behavior of 'C-x m' wrt prefix argument.
(Mail Headers): Remove the description of 'mail-from-style'.

* etc/NEWS: Mention that 'mail-from-style' is obsolete.

(Bug#40561)

Fix build failure with Fx_gtk_debug

* src/xfns.c (Fx_gtk_debug, Sx_gtk_debug): Define only for GTK
versions >= 3.14.0 so gtk_window_set_interactive_debugging is
defined.  Reported by Andreas Schwab  <schwab@linux-m68k.org>.

; * etc/NEWS: NEWS followup to recent changes in hi-lock.el.

Remove UNSIGNED_CMP

I added this macro in 2011 to fix some signedness comparison bugs.
However, it’s a weird macro and the bugs can be fixed in a
more-straightforward way.  This helps performance slightly (0.5%) on my
platform (Fedora 31 x86-64, GCC 9.3.1 with -O2).
* src/casefiddle.c (do_casify_natnum): Use simple comparison
instead of UNSIGNED_CMP.
* src/character.h (CHAR_VALID_P, SINGLE_BYTE_CHAR_P, CHAR_STRING):
* src/composite.h (COMPOSITION_ENCODE_RULE_VALID):
* src/lisp.h (ASCII_CHAR_P):
Now an inline function, and uses simple comparison instead of
UNSIGNED_CMP.
* src/dispextern.h (FACE_FROM_ID, FACE_FROM_ID_OR_NULL)
(IMAGE_FROM_ID, IMAGE_OPT_FROM_ID): Move these to ...
* src/frame.h (FACE_FROM_ID, FACE_FROM_ID_OR_NULL)
(IMAGE_FROM_ID, IMAGE_OPT_FROM_ID): ... here, and make them
inline functions that no longer use UNSIGNED_CMP.
* src/keyboard.c (read_char): UNSIGNED_CMP is not needed here
since XFIXNAT always returns a nonnegative value.
* src/lisp.h (UNSIGNED_CMP): Remove; no longer used.

* lisp/hi-lock.el (hi-lock-highlight-range): Bump default value (bug#40224)

* lisp/hi-lock.el (hi-lock-highlight-range): Change default value
from 200_000 to 2_000_000.

Implement case-insensitivity in hi-lock (bug#40337)

* lisp/hi-lock.el (hi-lock-interactive-lighters): New buffer-local variable.
(hi-lock-mode): Set hi-lock-interactive-lighters to nil.
(hi-lock-line-face-buffer): Use case-fold-search and search-upper-case.
(hi-lock-face-buffer): Add new arg LIGHTER. Use case-fold-search,
search-upper-case and search-spaces-regexp.
(hi-lock-face-phrase-buffer): Don't call hi-lock-process-phrase.
Use case-fold-search, search-upper-case and search-whitespace-regexp.
(hi-lock-face-symbol-at-point): Use case-fold-search and search-upper-case.
(hi-lock-unface-buffer): Use hi-lock-interactive-lighters to get
a human-readable string for completion and x-popup-menu.
(hi-lock-process-phrase): Remove function.
(hi-lock-set-pattern): Add new args LIGHTER, CASE-FOLD, SPACES-REGEXP.
Set font-lock pattern to a search function.  Add mapping from
lighter or regexp to pattern to hi-lock-interactive-lighters.
Let-bind case-fold-search and search-spaces-regexp in search functions.

* lisp/isearch.el (isearch--highlight-regexp-or-lines): Replace ugly code
with let-binding of case-fold-search, search-upper-case, search-spaces-regexp.
(isearch-highlight-regexp, isearch-highlight-lines-matching-regexp):
Use lambda.

Mention jit-lock deferred as an alternative to fast-but-imprecise-scrolling

* doc/emacs/display.texi (Scrolling): Add a paragraph on using jit-lock
deferred fontification as a way of obviating Emacs hanging after
auto-repeated scrolling.

* etc/NEWS: Mention 'cl-font-lock-built-in-mode'

* lisp/progmodes/cl-font-lock.el: Fix header and make it a minor mode

Change copyright to FSF and licence to GPLv3+.
Tweak Commentary (the code doesn't seem to provide the lambda
prettification mentioned).

(cl-font-lock-add-regexes): Remove macro.
(cl-font-lock-built-in-keywords): New variable.
(cl-font-lock-built-in-mode): New minor mode.

* lisp/progmodes/cl-font-lock.el: New file

Taken from commit 1a54066611da213626ab69ea426ba3c63ece3438
of https://github.com/cl-font-lock/cl-font-lock,
but with names reverted to a `cl-font-lock-` prefix.

Allow ENCODE_FILE and DECODE_FILE to use no-copy conversion

They already did return their argument under some circumstances;
this change broadens it to further reduce allocation in common cases
(bug#40407).

* src/coding.c (convert_string_nocopy): New function.
(decode_file_name, encode_file_name): Use convert_string_nocopy.
* src/coding.h (ENCODE_FILE, DECODE_FILE): Note the nocopy semantics.

Merge from origin/emacs-27

fd27685c1e (origin/emacs-27) ; * doc/lispref/keymaps.texi (Extended M...
6057d79a4e * doc/lispref/keymaps.texi (Extended Menu Items): Tweak :k...
17a1bb5a03 Fix redisplay when scrolling under redisplay-dont-pause
90321f595c Fix face extension in pulse.el
36c42d2a30 * doc/misc/tramp.texi (Bug Reports): Avoid line breaks in ...
d5750af151 Avoid assertion violation in intervals.c
18d1bc0a09 Improve documentation of 'jit-lock-contextually'
08486f4cae Speed up 'resize-mode' child frames a little
f451ef9308 ; * etc/NEWS: Mention 'executing-macro' in removed vars.
c49d379f17 Fix some problems with moving and resizing child frames

# Conflicts:
# etc/NEWS

; * lisp/eshell/esh-var.el (eshell-variable-aliases-list): Fix wording.

Reword documentation for eshell-variable-aliases-list

* lisp/eshell/esh-var.el (eshell-variable-aliases-list): Update
documentation string to avoid passive tense.

* lisp/net/tramp.el (tramp-action-process-alive): Read pending output.

; * doc/lispref/keymaps.texi (Extended Menu Items): Fix last change.

* doc/lispref/keymaps.texi (Extended Menu Items): Tweak :key-sequence

Don't make it sound like `:key-sequence nil` is any different than the
absence of `:key-sequence`.  And the performance advantage of
`:key-sequence` disappeared long ago.

Fix redisplay when scrolling under redisplay-dont-pause

* src/dispnew.c (update_window): Reset the window's
'must_be_updated_p' flag if the window's update was completed
without interruption.  This fixes redisplay glitches when
'redisplay-dont-pause' is nil, at least on MS-Windows, because
'expose_window' doesn't redraw the exposed rectangle when the
window's 'must_be_updated_p' flag is set.

Fix face extension in pulse.el

* lisp/cedet/pulse.el (pulse-reset-face): Propagate the :extend
attribute of FACE to the face used for displaying the pulse.
Reported by Adam Porter <adam@alphapapa.net>.

Set last-coding-system-used upon ASCII conversion bypass (bug#40407)

Spotted by Kazuhiro Ito.

* src/coding.c (code_convert_string):
Set Vlast_coding_system if appropriate.
* test/src/coding-tests.el (coding-nocopy-ascii): Add test.

* doc/misc/tramp.texi (Bug Reports): Avoid line breaks in traces.