3 files changed, 373 insertions, 19 deletions

diff --git a/ChangeLog.3 b/ChangeLog.3
index 10c2e2d4896..1c0745e9d7f 100644
--- a/ChangeLog.3
+++ b/ChangeLog.3
@@ -1,3 +1,331 @@
+2021-01-29  Eli Zaretskii  <eliz@gnu.org>
+
+        Bump Emacs version to 27.1.91
+
+                * README:
+                * configure.ac:
+                * nt/README.W32:
+                * msdos/sed2v2.inp: Bump Emacs version to 27.1.91.
+
+2021-01-27  Eli Zaretskii  <eliz@gnu.org>
+
+        Improve documentation of 'read-regexp' and friends
+
+        * doc/emacs/glossary.texi (Glossary): Add "Tag" to the Glossary.
+        * doc/emacs/maintaining.texi (Xref): Mention that identifiers are
+        also known as "tags".
+
+        * lisp/replace.el (read-regexp, read-regexp-suggestions): Improve
+        wording of doc strings.  (Bug#46088)  (Bug#46089)
+
+        (cherry picked from commit 49eb03d6c8a181fd46adbbcf1f0a976d0a9efa87)
+
+2021-01-27  Lars Ingebrigtsen  <larsi@gnus.org>
+
+        read-regexp-suggestions doc string improvement
+
+        * lisp/replace.el (read-regexp-suggestions): Add a link to the
+        manual to explain what a tag is (bug#46089).
+
+        (cherry picked from commit f9cc2d48246fe8370e9286866e6115ba8e2acf44)
+
+2021-01-27  Lars Ingebrigtsen  <larsi@gnus.org>
+
+        Try to improve the read-regexp doc string
+
+        * lisp/replace.el (read-regexp): Attempt to clarify the semantics
+        (bug#46088).
+
+        (cherry picked from commit eded2a7ad7d456a417354a2797c18e9a578414d7)
+
+2021-01-23  Dmitry Gutov  <dgutov@yandex.ru>
+
+        Erase the buffer only after fetching the new contents
+
+        * lisp/progmodes/xref.el (xref-revert-buffer):
+        Erase the buffer only after fetching the new contents (bug#46042).
+
+        (cherry picked from commit 5821dee0949b2913c07970d6e4b8bb8e8a35f036)
+
+2021-01-23  Eli Zaretskii  <eliz@gnu.org>
+
+        Fix last change
+
+        * doc/lispref/text.texi (Undo): Add a cross-reference to the
+        description of 'undo-amalgamate-change-group'.
+        (Atomic Changes): Expand and improve the description of
+        'undo-amalgamate-change-group'.  (Bug#42303)
+
+2021-01-23  Lars Ingebrigtsen  <larsi@gnus.org>
+
+        Mention undo-amalgamate-change-group in the lispref manual
+
+        * doc/lispref/text.texi (Atomic Changes): Mention
+        undo-amalgamate-change-group (bug#42303).
+
+        (cherry picked from commit ba25a82855a2c03c25fec83f3056c166b692e94f)
+
+2021-01-22  Eli Zaretskii  <eliz@gnu.org>
+
+        Avoid sending systemd shutdown notifications if non-daemon
+
+        * src/emacs.c (Fkill_emacs): Send the shutdown notification only
+        in daemon mode.  (Bug#46022)
+
+2021-01-22  Eli Zaretskii  <eliz@gnu.org>
+
+        * src/cmds.c (Fforward_line): Doc fix.  (Bug#46027)
+
+2021-01-22  Eli Zaretskii  <eliz@gnu.org>
+
+        Improve documentation of sendmail.el defcustom's
+
+        * lisp/mail/sendmail.el (mail-archive-file-name)
+        (mail-default-reply-to, mail-self-blind, mail-default-headers):
+        Say in the doc string that 'message-default-mail-headers' shall be
+        customized when using 'message-mode' for email composition.
+        (Bug#46029)
+
+2021-01-20  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        Don't let `maybe_quit` prevent resetting `consing_until_gc` (bug#43389)
+
+        * src/alloc.c (garbage_collect): Postpone `unblock_input` a bit.
+        * src/window.c (window_parameter): Avoid `maybe_quit`.
+
+        cherry picked from commit 420661af07448857f0a17e15dc27bceeb6aff541
+
+2021-01-13  Juri Linkov  <juri@linkov.net>
+
+        Remove one of recently added warnings abound binding keys in Isearch maps
+
+        * lisp/isearch.el (minibuffer-local-isearch-map): Remove comments
+        which warn against wantonly rebinding unbound keys from
+        irrelevant keymap.
+        https://lists.gnu.org/archive/html/emacs-devel/2021-01/msg00259.html
+
+2021-01-10  Martin Rudalics  <rudalics@gmx.at>
+
+        Fix assertion failure in window_box_height (Bug#45737)
+
+        * lisp/window.el (window-sizable): Don't try to grow a mini window
+        when the root window's minimum height is already larger than its
+        actual height (Bug#45737).
+
+2021-01-09  Eli Zaretskii  <eliz@gnu.org>
+
+        Fix cl-concatenate inlining
+
+        * lisp/emacs-lisp/seq.el (seq-concatenate): Auto-load it.  Do not
+        merge to master.  (Bug#45610)
+
+2021-01-09  Tak Kunihiro  <tkk@misasa.okayama-u.ac.jp>
+
+        Fix infloop in 'pixel-scroll-mode'
+
+        * lisp/pixel-scroll.el (pixel-scroll-up, pixel-scroll-down): Avoid
+        inflooping when 'vertical-motion' doesn't move.  (Bug#45628)
+
+2021-01-08  Eli Zaretskii  <eliz@gnu.org>
+
+        Fix inhibiting the default.el loading in user init file
+
+        * lisp/startup.el (startup--load-user-init-file): Test the value
+        of 'inhibit-default-init', not just the LOAD-DEFAULTS argument,
+        because loading the user's init file could have set the value of
+        the former.
+        (command-line): Call 'startup--load-user-init-file' with last arg
+        t: there's no longer any need to test the value of
+        'inhibit-default-init' here, as it will be tested by the called
+        function.  (Bug#45708)
+
+2021-01-07  Lars Ingebrigtsen  <larsi@gnus.org>
+
+        Fix problem with 8bit content-transfer-encoding in nndoc mbox files
+
+        * lisp/gnus/nndoc.el (nndoc-possibly-change-buffer): If we're
+        reading an mbox file, it may contain messages that use
+        content-transfer-encoding 8bit, which means that we have to treat
+        the file as a sequence of byte (bug#42951).  This avoids
+        double-decoding -- once by Emacs when inserting the mbox into the
+        buffer, and once by Gnus when displaying the articles.
+
+2021-01-05  Michael Albinus  <michael.albinus@gmx.de>
+
+        * doc/misc/tramp.texi (Quick Start Guide): Fix thinko.
+
+2021-01-05  Robert Pluim  <rpluim@gmail.com>
+
+        Tell people how to remove fontconfig customizations
+
+2021-01-04  Simen Heggestøyl  <simenheg@gmail.com>
+
+        Remove extraneous closing paren
+
+        * doc/lispref/modes.texi (SMIE Indentation Example): Remove extraneous
+        closing paren.
+
+2021-01-04  Mauro Aranda  <maurooaranda@gmail.com>
+
+        Update two user option names in the Widget manual
+
+        * doc/misc/widget.texi (Basic Types): The user options
+        widget-glyph-directory and widget-glyph-enable were renamed long ago
+        to widget-image-directory and widget-image-enable, but the manual
+        kept calling them by their old names.  Update the names.
+
+2021-01-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Mention -lcurses problem on AIX
+
+        * etc/PROBLEMS: Describe problem with Emacs 27 and -lcurses.
+        Do not merge to master.
+
+2021-01-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Revert previous patch which was installed into wrong branch.
+
+2021-01-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Fix broken build on AIX 7.2
+
+        Without this fix, the build on AIX 7.2 with xlc fails in the ‘CCLD
+        temacs’ step with the diagnostic ‘ld: 0711-317 ERROR: Undefined
+        symbol: BC’.  This is because -lcurses does not define BC etc.
+        * configure.ac: When building terminfo.o, define
+        TERMINFO_DEFINES_BC if the library defines BC etc.
+        * src/terminfo.c (UP, BC, PC): Define depending on
+        TERMINFO_DEFINES_BC, not on TERMINFO.
+
+2021-01-02  Eli Zaretskii  <eliz@gnu.org>
+
+        Fix last change
+
+        * doc/lispref/strings.texi (Creating Strings): Improve wording of
+        last change.  (Bug#45516)
+
+2021-01-02  Lars Ingebrigtsen  <larsi@gnus.org>
+
+        Add a reference between the Strings node and Search/Replace
+
+        * doc/lispref/strings.texi (Creating Strings): Mention
+        string-replace/replace-regexp-in-string (bug#45516).
+
+        (cherry picked from commit b9359d4183a1a6923122d3aa12b922ab89693354)
+
+2021-01-01  Eli Zaretskii  <eliz@gnu.org>
+
+        Add warning comments abound binding keys in Isearch maps
+
+        * lisp/isearch.el (isearch-mode-map)
+        (minibuffer-local-isearch-map): Add comments which warn against
+        wantonly rebinding unbound keys.
+
+2021-01-01  Alan Third  <alan@idiocy.org>
+
+        Fix crash in ns_mouse_position (bug#45541)
+
+        * src/nsterm.m (ns_mouse_position): Explicitly initialize f to NULL.
+
+2021-01-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Fix copyright years by hand
+
+        These are dates that admin/update-copyright did not update.
+
+2021-01-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Update copyright year to 2021
+
+        Run "TZ=UTC0 admin/update-copyright $(git ls-files)".
+
+2020-12-31  Eli Zaretskii  <eliz@gnu.org>
+
+        Improve documentation of 'network-lookup-address-info'
+
+        * src/process.c (Fnetwork_lookup_address_info):
+        * doc/lispref/processes.texi (Misc Network): Document the error
+        message emitted by 'network-lookup-address-info' when it fails.
+
+2020-12-28  Amin Bandali  <bandali@gnu.org>
+
+        Display messages sent using ERC's /say
+
+        * lisp/erc/erc.el (erc-cmd-SAY): Call `erc-display-msg' to display the
+        user's message in the buffer, just like other [non-command] messages.
+
+        https://lists.gnu.org/r/help-gnu-emacs/2020-12/msg00066.html
+
+2020-12-26  Eli Zaretskii  <eliz@gnu.org>
+
+        Fix Rmail summary display when From: header is malformed
+
+        * lisp/mail/rmailsum.el (rmail-header-summary): Remove newlines
+        from the "From:" value, to avoid producing corrupted summary
+        display.
+
+2020-12-25  Eli Zaretskii  <eliz@gnu.org>
+
+        Add more details to the "word processor" section
+
+        * etc/TODO (Emacs as word processor): Add more details based on
+        recent discussions.
+
+2020-12-23  Philipp Stephani  <phst@google.com>
+
+        * src/Makefile.in (DO_CODESIGN): Fix expected architecture name.
+
+2020-12-23  Itai Seggev  <is+apple@cs.hmc.edu>  (tiny change)
+
+        Codesign the executable on recene MacOS systems
+
+        * src/Makefile.in (temacs$(EXEEXT)): Codesign the executable on
+        recent (ARM) MacOS systems (bug#43878).  Without this, building
+        Emacs fails.
+
+2020-12-23  Lars Ingebrigtsen  <larsi@gnus.org>
+
+        Support build of Emacs on ARM Macos machines
+
+        * configure.ac: Add support for aarch64-* on Macos (i.e., 64-bit
+        ARM) (bug#43369).
+
+2020-12-22  Bastien Guerry  <bzg@gnu.org>
+
+        Update to Org 9.4.4
+
+2020-12-21  Stefan Kangas  <stefan@marxist.se>
+
+        * lisp/so-long.el: Decrease use of passive voice.
+
+        Suggested by Richard Stallman <rms@gnu.org>.
+
+2020-12-21  Stefan Kangas  <stefan@marxist.se>
+
+        * doc/misc/efaq.texi (New in Emacs 27): Add section.
+
+        * doc/misc/efaq.texi (Latest version of Emacs): Bump version.
+
+2020-12-19  Eli Zaretskii  <eliz@gnu.org>
+
+        * lisp/face-remap.el (face-remap-set-base): Doc fix.  (Bug#45264)
+
+2020-12-19  Vasilij Schneidermann  <mail@vasilij.de>
+
+        Correct argument order in comment
+
+        * etc/ETAGS.EBNF (position): Correct comment.
+
+2020-12-18  Eli Zaretskii  <eliz@gnu.org>
+
+        Update files for the 27.1.90 pretest
+
+        * README:
+        * configure.ac:
+        * nt/README.W32:
+        * msdos/sed2v2.inp: Bump Emacs version to 27.1.90.
+        * lisp/ldefs-boot.el: Update from loaddefs.el
+
 2020-12-18  Eli Zaretskii  <eliz@fencepost.gnu.org>
 
         * README:
@@ -144118,7 +144446,7 @@
 
 This file records repository revisions from
 commit 9d56a21e6a696ad19ac65c4b405aeca44785884a (exclusive) to
-commit 48b9c47805fc304441017f6ee4c114212cdb0496 (inclusive).
+commit 86a2207d9244f7cbef9f91e697ad5fc0ce49ec97 (inclusive).
 See ChangeLog.2 for earlier changes.
 
 ;; Local Variables:
diff --git a/etc/AUTHORS b/etc/AUTHORS
index 96948415570..b06b4012318 100644
--- a/etc/AUTHORS
+++ b/etc/AUTHORS
@@ -1454,9 +1454,9 @@ Eli Zaretskii: wrote [bidirectional display in xdisp.c]
   chartab-tests.el coding-tests.el doc-tests.el etags-tests.el rxvt.el
   tty-colors.el
 and changed xdisp.c msdos.c w32.c display.texi w32fns.c simple.el
-  files.el fileio.c keyboard.c w32term.c emacs.c w32proc.c text.texi
-  dispnew.c files.texi frames.texi lisp.h dispextern.h window.c term.c
-  process.c and 1192 other files
+  files.el fileio.c keyboard.c emacs.c w32term.c text.texi w32proc.c
+  dispnew.c files.texi frames.texi lisp.h dispextern.h window.c process.c
+  term.c and 1193 other files
 
 Emanuele Giaquinta: changed configure.ac rxvt.el charset.c etags.c
   fontset.c frame.el gnus-faq.texi loadup.el lread.c sh-script.el
@@ -2109,6 +2109,8 @@ Ismail S: changed org-capture.el
 
 Istvan Marko: changed gnus-agent.el xfns.c
 
+Itai Seggev: changed src/Makefile.in
+
 Itai Zukerman: changed mm-decode.el
 
 Ivan Andrus: changed editfns.c epg.el ffap.el find-file.el ibuf-ext.el
@@ -3075,7 +3077,7 @@ and co-wrote gnus-kill.el gnus-mh.el gnus-msg.el gnus-score.el
   rfc2047.el svg.el time-date.el
 and changed gnus.texi process.c subr.el simple.el files.el gnutls.c
   gnus-ems.el smtpmail.el display.texi url-http.el auth-source.el
-  gnus-cite.el pop3.el dired.el edebug.el gnus-xmas.el text.texi image.el
+  gnus-cite.el pop3.el dired.el edebug.el text.texi gnus-xmas.el image.el
   image.c gnutls.el nnrss.el and 658 other files
 
 Lars Rasmusson: changed ebrowse.c
@@ -3493,10 +3495,10 @@ Matt Swift: changed dired.el editfns.c lisp-mode.el mm-decode.el
   outline.el progmodes/compile.el rx.el simple.el startup.el
 
 Mauro Aranda: changed wid-edit.el cus-edit.el gnus.texi octave.el pong.el
-  autorevert.el cc-mode.texi control.texi custom-tests.el custom.el
-  dbus.texi dired-x.texi elisp-mode.el epa.el esh-mode.el
+  widget.texi autorevert.el cc-mode.texi control.texi custom-tests.el
+  custom.el dbus.texi dired-x.texi elisp-mode.el epa.el esh-mode.el
   eshell/eshell.el eudc.texi files.texi functions.texi gnus-faq.texi
-  info.el and 15 other files
+  and 15 other files
 
 Maxime Edouard Robert Froumentin: changed gnus-art.el mml.el
 
@@ -4745,7 +4747,7 @@ and changed css-mode.el css-mode.css json-tests.el json.el sgml-mode.el
   scss-mode.scss page.el ring.el rot13.el scheme.el sql.el asm-mode.el
   autoinsert.el color.el files.el js.el less-css-mode.el
   less-css-mode.less maintaining.texi makesum.el midnight.el
-  and 5 other files
+  and 6 other files
 
 Simona Arizanova: changed help.el
 
@@ -4808,7 +4810,7 @@ and changed bookmark.el package.el efaq.texi package.texi ibuffer.el
   mwheel.el cperl-mode.el fns.c gud.el simple.el subr.el tips.texi
   autoinsert.el comint-tests.el control.texi cus-edit.el delim-col.el
   dired-aux.el dired-x.el em-term.el emacs-lisp-intro.texi
-  and 157 other files
+  and 158 other files
 
 Stefan Merten: co-wrote rst.el
 
@@ -5337,7 +5339,7 @@ Valery Alexeev: changed cyril-util.el cyrillic.el
 
 Van L: changed subr.el
 
-Vasilij Schneidermann: changed cus-start.el eww.el cc-mode.el
+Vasilij Schneidermann: changed cus-start.el eww.el ETAGS.EBNF cc-mode.el
   debugging.texi display.texi edebug.el emacs-lisp/debug.el eval.c
   ielm.el os.texi profiler.el redisplay-testsuite.el shr.el snake.el
   term.el tetris.el xdisp.c xterm.c
diff --git a/lisp/ldefs-boot.el b/lisp/ldefs-boot.el
index 7d4c7b84bfd..f0dc2680d32 100644
--- a/lisp/ldefs-boot.el
+++ b/lisp/ldefs-boot.el
@@ -29364,7 +29364,9 @@ variable `feedmail-deduce-envelope-from'.")
 (defvar mail-self-blind nil "\
 Non-nil means insert Bcc to self in messages to be sent.
 This is done when the message is initialized,
-so you can remove or alter the Bcc field to override the default.")
+so you can remove or alter the Bcc field to override the default.
+If you are using `message-mode' to compose messages, customize the
+variable `message-default-mail-headers' instead.")
 
 (custom-autoload 'mail-self-blind "sendmail" t)
 
@@ -29392,14 +29394,18 @@ Line used to separate headers from text in messages being composed.")
 (defvar mail-archive-file-name nil "\
 Name of file to write all outgoing messages in, or nil for none.
 This is normally an mbox file, but for backwards compatibility may also
-be a Babyl file.")
+be a Babyl file.
+If you are using `message-mode' to compose messages, customize the
+variable `message-default-mail-headers' instead.")
 
 (custom-autoload 'mail-archive-file-name "sendmail" t)
 
 (defvar mail-default-reply-to nil "\
 Address to insert as default Reply-To field of outgoing messages.
 If nil, it will be initialized from the REPLYTO environment variable
-when you first send mail.")
+when you first send mail.
+If you are using `message-mode' to compose messages, customize the
+variable `message-default-mail-headers' instead.")
 
 (custom-autoload 'mail-default-reply-to "sendmail" t)
 
@@ -29486,7 +29492,9 @@ in `message-auto-save-directory'.")
 (defvar mail-default-headers nil "\
 A string containing header lines, to be inserted in outgoing messages.
 It can contain newlines, and should end in one.  It is inserted
-before you edit the message, so you can edit or delete the lines.")
+before you edit the message, so you can edit or delete the lines.
+If you are using `message-mode' to compose messages, customize the
+variable `message-default-mail-headers' instead.")
 
 (custom-autoload 'mail-default-headers "sendmail" t)
 
@@ -29633,6 +29641,13 @@ sorted.  FUNCTION must be a function of one argument.
 
 \(fn FUNCTION PRED SEQUENCE)" nil nil)
 
+(autoload 'seq-concatenate "seq" "\
+Concatenate SEQUENCES into a single sequence of type TYPE.
+TYPE must be one of following symbols: vector, string or list.
+
+
+\(fn TYPE SEQUENCE...)" nil nil)
+
 (autoload 'seq-filter "seq" "\
 Return a list of all the elements for which (PRED element) is non-nil in SEQUENCE.
 
@@ -38637,10 +38652,19 @@ Zone out, completely." t nil)
 ;;;;;;  "eshell/em-unix.el" "eshell/em-xtra.el" "facemenu.el" "faces.el"
 ;;;;;;  "files.el" "font-core.el" "font-lock.el" "format.el" "frame.el"
 ;;;;;;  "help.el" "hfy-cmap.el" "ibuf-ext.el" "indent.el" "international/characters.el"
-;;;;;;  "international/charscript.el" "international/cp51932.el"
-;;;;;;  "international/eucjp-ms.el" "international/mule-cmds.el"
-;;;;;;  "international/mule-conf.el" "international/mule.el" "isearch.el"
-;;;;;;  "jit-lock.el" "jka-cmpr-hook.el" "language/burmese.el" "language/cham.el"
+;;;;;;  "international/charprop.el" "international/charscript.el"
+;;;;;;  "international/cp51932.el" "international/eucjp-ms.el" "international/mule-cmds.el"
+;;;;;;  "international/mule-conf.el" "international/mule.el" "international/uni-bidi.el"
+;;;;;;  "international/uni-brackets.el" "international/uni-category.el"
+;;;;;;  "international/uni-combining.el" "international/uni-comment.el"
+;;;;;;  "international/uni-decimal.el" "international/uni-decomposition.el"
+;;;;;;  "international/uni-digit.el" "international/uni-lowercase.el"
+;;;;;;  "international/uni-mirrored.el" "international/uni-name.el"
+;;;;;;  "international/uni-numeric.el" "international/uni-old-name.el"
+;;;;;;  "international/uni-special-lowercase.el" "international/uni-special-titlecase.el"
+;;;;;;  "international/uni-special-uppercase.el" "international/uni-titlecase.el"
+;;;;;;  "international/uni-uppercase.el" "isearch.el" "jit-lock.el"
+;;;;;;  "jka-cmpr-hook.el" "language/burmese.el" "language/cham.el"
 ;;;;;;  "language/chinese.el" "language/cyrillic.el" "language/czech.el"
 ;;;;;;  "language/english.el" "language/ethiopic.el" "language/european.el"
 ;;;;;;  "language/georgian.el" "language/greek.el" "language/hebrew.el"