* src/buffer.h (struct buffer): Remove unused field `minor_modes`

* src/buffer.c (bset_minor_modes): Remove function.
(reset_buffer_local_variables, init_buffer_once): Don't set `minor_modes`.

Use decoding implementation from `insert-directory' in Tramp

* lisp/net/tramp-sh.el (tramp-sh-handle-insert-directory):
Use decoding implementation from `insert-directory', it is more robust.

More string-search optimisations

All-ASCII strings cannot have substrings with non-ASCII characters in
them; use this fact to avoid searching entirely.

* src/fns.c (Fstring_search): For multibyte non-ASCII needle and
unibyte haystack, don't check if the haystack is all-ASCII; it's a
waste of time. For multibyte non-ASCII needle and multibyte
all-ASCII haystack, fail immediately.
* test/src/fns-tests.el (string-search): Add more test cases.

* etc/NEWS: Restore entries accidentally removed by previous commit.

In attempted recursive minibuffer use, display error message in correct frame

This was problematic when minibuffer-follows-selected-frame was non-nil.
Introduce a new parameter DONT-SET-FRAME to set-window-configuration.

* doc/lispref/windows.texi (Window Configurations): Describe the new &optional
parameter to set-window-configuration.

* etc/NEWS (Lisp Changes): Note the new parameter to set-window-configuration.

* src/keyboard.c (read_char_help_form_unwind): Add a new Qnil argument to the
call of Fset_window_configuration.

* src/minibuf.c (read_minibuf): Cons up a Qt with the window configuration in
the argument to record_unwind_protect for the window configuration (twice).

* src/window.c (Fset_window_configuration): Add the new &optional parameter
and document it in the doc string.  At the final do_switch_frame operation,
restore the original frame when DONT-SET-FRAME is non-nil.
(restore_window_configuration): Handle the new parameter when the supplied
argument is a cons.

Remove outdated comment about Emacs 20 from viper.el

* lisp/emulation/viper-util.el (viper-chars-in-region): Remove
outdated comment.

Add new variable cperl-tags-file-name

* lisp/progmodes/cperl-mode.el (cperl-tags-file-name): New variable.
(cperl-write-tags): Use above new variable instead of hardcoding
filename "TAGS".  (Bug#8802)

Declare XEmacs compat function in inversion.el obsolete

* lisp/cedet/inversion.el (inversion-require-emacs): Declare obsolete.

Assume font-lock is provided; it's preloaded since 22.1

* lisp/cedet/semantic/format.el (semantic--format-colorize-text):
* lisp/eshell/em-ls.el (eshell-ls--insert-directory):
* lisp/net/dig.el (dig-mode):
* lisp/progmodes/cperl-mode.el (cperl-pod-here-fontify):
* lisp/progmodes/idlw-help.el (idlwave-help-fontify):
* lisp/progmodes/idlwave.el (idlwave-completion-fontify-classes):
Don't check for feature 'font-lock; it has been preloaded since 22.1.
* lisp/cedet/semantic/format.el (font-lock):
* lisp/epa.el (font-lock):
* lisp/erc/erc.el (font-lock):
* lisp/generic-x.el (font-lock):
* lisp/net/sieve-mode.el (font-lock):
* lisp/progmodes/prolog.el (font-lock):
* lisp/textmodes/rst.el (font-lock): Remove unnecessary require.

* lisp/progmodes/cperl-mode.el: Doc fix.

Remove unnecessary load from idlwave

* lisp/progmodes/idlw-shell.el:
* lisp/progmodes/idlwave.el: Remove unnecessary load; easy-menu-define
is autoloaded.

Make compat alias add-submenu obsolete

* lisp/emacs-lisp/easymenu.el (add-submenu): Make compat alias
obsolete.
* lisp/filesets.el (filesets-build-menu-now): Don't use above
obsolete alias.
(filesets-menu-path, filesets-menu-before)
(filesets-menu-in-menu): Doc fix.

Fix SVG display again (bug#44655)

* src/image.c (svg_load_image): Fall back to
rsvg_handle_get_dimensions if we can't calculate the size of the
image.

Clarify that 'diff-error' is part of Emacs 28.1

* lisp/vc/diff-mode.el (diff-error): Add :version tag (bug#44727).

Turn gdb-wait-for-pending into a plain function

This avoids unnecessary body duplication in expansion and macro
recursion (causing macro-expansions at runtime), making it clearer
what is going on.

* lisp/progmodes/gdb-mi.el (gdb-wait-for-pending): Make it a function,
remove lambda quoting,  η-reduce and simplify.
(gdb-thread-exited, gdb-thread-selected): Adapt callers.

Don't make bibtex-unify-case-convert buffer-local

The :local tag does not currently work as intended (it results in a
default value of bibtex-unify-case-convert of nil rather than
identity), and no other bibtex.el user option is automatically
buffer-local, so revert this recent change.

For discussion, see the following emacs-devel thread:
https://lists.gnu.org/r/emacs-devel/2020-11/msg00734.html

* lisp/textmodes/bibtex.el (bibtex-unify-case-convert): Don't make
automatically buffer-local for consistency with other user options,
and because the :local tag doesn't have the intended results.

Preserve `dired-filename' text properties in Tramp

* lisp/net/tramp-sh.el (tramp-sh-handle-insert-directory):
Restore `dired-filename' text property, which has been destroyed
by `decode-coding-region'.  (Bug#44682)

Remove redundant 'function's around lambdas

* lisp/allout.el (allout-latex-verb-quote):
* lisp/edmacro.el (edmacro-format-keys):
* lisp/ffap.el (ffap-all-subdirs-loop)
(ffap-kpathsea-expand-path, ffap-menu-rescan):
* lisp/files.el (save-buffers-kill-emacs):
* lisp/find-lisp.el (find-lisp-find-dired-internal)
(find-lisp-insert-directory):
* lisp/gnus/gnus-agent.el (gnus-agent-expire-unagentized-dirs):
* lisp/gnus/nnmairix.el (nnmairix-create-message-line-for-search)
(nnmairix-widget-get-values)
(nnmairix-widget-make-query-from-widgets)
(nnmairix-widget-build-editable-fields):
* lisp/international/mule-cmds.el (sort-coding-systems):
* lisp/international/mule-diag.el (list-character-sets-1):
* lisp/international/quail.el (quail-insert-decode-map):
* lisp/mail/reporter.el (reporter-dump-state):
* lisp/mail/supercite.el (sc-attribs-filter-namelist):
* lisp/pcmpl-gnu.el (pcmpl-gnu-zipped-files)
(pcmpl-gnu-bzipped-files):
* lisp/progmodes/cperl-mode.el (cperl-find-tags)
(cperl-write-tags, cperl-tags-hier-init, cperl-tags-treeify)
(cperl-menu-to-keymap, cperl-pod-spell):
* lisp/progmodes/gdb-mi.el (gdb-parent-mode):
* lisp/progmodes/make-mode.el (makefile-browser-fill):
* lisp/simple.el (transpose-lines):
* lisp/term.el:
* lisp/term/w32-win.el (w32-find-non-USB-fonts):
* lisp/textmodes/table.el (table--generate-source-scan-lines): Remove
redundant 'function's around lambdas.

Remove redundant 'function's around lambdas in mh/*.el

* lisp/mh-e/mh-alias.el (mh-alias-tstamp, mh-alias-filenames)
(mh-alias-address-to-alias):
* lisp/mh-e/mh-comp.el (mh-edit-again, mh-redistribute):
* lisp/mh-e/mh-identity.el (mh-identity-make-menu):
* lisp/mh-e/mh-utils.el (mh-help): Remove redundant 'function's around
lambdas.

Enhance syntax-tests.el to test nestable comments (Lisp style)

Also add some tests for braces and parse-partial-sexp amongst Lisp style
comments.

* test/src/syntax-tests.el (\;-in, \;-out): Add syntax for { and }.
(top-level): Add new tests for Lisp style comments.
(\#|-in, \#|-out): New functions.
(top-level): Add new tests for nested Lisp style comments, and mixtures of
nested comments with "ordinary" comments.

* test/src/syntax-resources/syntax-comments.txt (top-level): Add new test
fragments for #|...|#, etc.

Don't quote lambdas with 'function' in calc/*.el

* lisp/calc/calc-aent.el (calc-do-quick-calc)
(calc-do-calc-eval, math-build-parse-table):
* lisp/calc/calc-alg.el (math-polynomial-base):
* lisp/calc/calc-alg.el (math-is-poly-rec):
* lisp/calc/calc-arith.el (calcFunc-scf):
* lisp/calc/calc-arith.el (math-ceiling, math-round):
* lisp/calc/calc-arith.el (math-trunc-fancy, math-floor-fancy):
* lisp/calc/calc-ext.el (calc-init-extensions, calc-reset)
(calc-refresh-top, calc-z-prefix-help, calc-binary-op-fancy)
(calc-unary-op-fancy):
* lisp/calc/calc-forms.el (math-make-mod):
* lisp/calc/calc-frac.el (calcFunc-frac):
* lisp/calc/calc-funcs.el (calcFunc-euler):
* lisp/calc/calc-help.el (calc-full-help):
* lisp/calc/calc-lang.el (c, pascal, fortran, tex, latex, eqn)
(yacas, maxima, giac, math, maple):
* lisp/calc/calc-macs.el (calc-wrapper, calc-slow-wrapper):
* lisp/calc/calc-map.el (calc-get-operator, calcFunc-mapeqr)
(calcFunc-reducea, calcFunc-rreducea, calcFunc-reduced)
(calcFunc-rreduced, calcFunc-outer):
* lisp/calc/calc-misc.el (another-calc, calc-do-handle-whys):
* lisp/calc/calc-mode.el (calc-save-modes):
* lisp/calc/calc-mtx.el (math-col-matrix, math-mul-mat-vec):
* lisp/calc/calc-poly.el (math-sort-terms, math-poly-div-list)
(math-mul-list, math-sort-poly-base-list)
(math-partial-fractions):
* lisp/calc/calc-prog.el (calc-user-define-formula):
* lisp/calc/calc-rewr.el (math-rewrite, math-compile-patterns)
(math-compile-rewrites, math-parse-schedule)
(math-rwcomp-pattern):
* lisp/calc/calc-store.el (calc-var-name-map, calc-let)
(calc-permanent-variable, calc-insert-variables):
* lisp/calc/calc-stuff.el (calc-flush-caches, calcFunc-pclean)
(calcFunc-pfrac):
* lisp/calc/calc-units.el (math-build-units-table)
(math-decompose-units):
* lisp/calc/calc-vec.el (calcFunc-mrow, math-mat-col)
(calcFunc-mcol, math-mat-less-col, math-mimic-ident):
* lisp/calc/calc-yank.el (calc-edit):
* lisp/calc/calc.el
(calc-mode-var-list-restore-default-values)
(calc-mode-var-list-restore-saved-values, calc-mode, calc-quit):
* lisp/calc/calccomp.el (math-compose-expr)
(math-compose-matrix, math-vector-to-string): Don't quote lambdas with
'function'.

Add command to filter package menu by name or description

* lisp/emacs-lisp/package.el (package-menu-filter-by-description):
(package-menu-filter-by-name-or-description): New commands to filter
the package menu.  (Bug#44699)
(package-menu-mode-map): Bind the above new commands.
(package-menu-mode-menu): Add new commands to the menu.
* doc/emacs/package.texi (Package Menu): Document new commands.

Don't quote lambdas with function macro in generic-x.el

* lisp/generic-x.el (apache-conf-generic-mode, ini-generic-mode)
(reg-generic-mode, mailagent-rules-generic-mode)
(vrml-generic-mode, java-properties-generic-mode)
(alias-generic-mode, ansible-inventory-generic-mode)
(inetd-conf-generic-mode, etc-services-generic-mode)
(etc-passwd-generic-mode, etc-fstab-generic-mode)
(spice-generic-mode, astap-generic-mode): Don't quote lambdas with
function macro.

Test that substitute-command-keys preserves text properties

* test/lisp/help-tests.el
(help-substitute-command-keys/preserves-text-properties): New test.
(Bug#17052)

; Fix last change to bibtex.el

* lisp/textmodes/bibtex.el (bibtex-unify-case-convert): Clarify
docstring and remove leading asterisk.  Use defcustom :local tag.

perl-mode and cperl-mode: Recognize regex after "return"

* lisp/progmodes/cperl-mode.el (cperl-find-pods-heres): Add
"return" to the keywords which start a regex.

* lisp/progmodes/perl-mode.el (defconst): Add "return" to
'perl--syntax-exp-intro-keywords' (Bug#26850).

* test/lisp/progmodes/cperl-mode-tests.el (cperl-test-bug-28650):
New test (bug#26850).

Minor Edebug manual keystroke clarifications

* doc/lispref/edebug.texi (Edebug Misc): Also mention the `a'
binding to abort (bug#44697).  Also fix `d' function reference, and
add `P' reference.

Make the handwrite.el PS valid again

* lisp/play/handwrite.el (handwrite): Make the PS valid
(bug#44648).  Suggested by Omar Antolín <omar.antolin@gmail.com>.

Fix gnus-mime-display-alternative button natigation

* lisp/gnus/gnus-art.el (gnus-mime-display-alternative): Mark the
buttons correctly so that TAB can find them (bug#44690).

Use 'eshell-find-alias-function' instead of fboundp

* lisp/eshell/esh-cmd.el (eshell-invoke-directly): Fix problem
with (require 'em-tramp) making password prompting from "sudo
bash" no longer work (bug#43772).

Add new user option bibtex-unify-case-convert

* lisp/textmodes/bibtex.el (bibtex-unify-case-convert): New
variable (bug#44614).
(bibtex-format-entry): Use it (bug#44614).

Use lexical-binding in time-stamp.el

* lisp/time-stamp.el: Use lexical-binding.  Remove redundant :group
args.

Don't quote lambdas in net/*.el

* lisp/net/eudc-export.el (eudc-create-bbdb-record):
* lisp/net/eudc.el (eudc-print-attribute-value)
(eudc-display-records, eudc-process-form)
(eudc-filter-duplicate-attributes, eudc-filter-partial-records)
(eudc-add-field-to-records, eudc-query-with-words)
(eudc-query-form, eudc-menu):
* lisp/net/eudcb-bbdb.el (eudc-bbdb-extract-phones)
(eudc-bbdb-query-internal):
* lisp/net/mairix.el (mairix-widget-make-query-from-widgets)
(mairix-widget-build-editable-fields, mairix-widget-get-values):
Don't quote lambdas.

Don't quote lambdas in emacs-lisp/*.el

* lisp/emacs-lisp/cl-seq.el (cl--parsing-keywords, cl-sort):
* lisp/emacs-lisp/cl-macs.el (cl-typecase):
* lisp/emacs-lisp/cl-extra.el (cl-some, cl-every)
(cl--map-keymap-recursively):
* lisp/emacs-lisp/advice.el (ad-insert-argument-access-forms):
* lisp/emacs-lisp/edebug.el (edebug-sort-alist)
(edebug-set-windows):
* lisp/emacs-lisp/pp.el (pp-display-expression):
* lisp/emacs-lisp/regi.el (regi-interpret): Don't quote lambdas.

Merge from origin/emacs-27

75723ec212 (origin/emacs-27) ; * lisp/emacs-lisp/benchmark.el (benchm...
53e2a612ad ; * lib-src/make-fingerprint.c: Update commentary.
286c632772 Reformat argument commentary in etags.c
4ec740866a Make the invocation of combine-change-calls in comment-reg...
66bcec8838 * lisp/progmodes/cc-langs.el (c-<>-notable-chars-re): Fix ...
03eeab469e ; Update the expected result files in test/manual/etags.
d875a22bc6 Update the various INSTALL files

# Conflicts:
# INSTALL

; Merge from origin/emacs-27

The following commit was skipped:

e2c7b6372d Don't leave lock files after 'replace-buffer-contents'

Merge from origin/emacs-27

19da602991 Fix input method translation near read-only text
5aabf2cc7f Fix display of truncated R2L lines on TTY frames
daff3bda10 Avoid crashes when a reversed glyph row starts with a comp...
b697bb91a1 ; * .gitignore: src/fingerprint.c not generated since 2019...

Don't quote lambdas in calc/calcalg{2,3}.el

* lisp/calc/calcalg2.el (calcFunc-inv\', calcFunc-sqrt\')
(calcFunc-deg\', calcFunc-rad\', calcFunc-ln\')
(calcFunc-log10\', calcFunc-lnp1\', calcFunc-log\')
(calcFunc-log\'2, calcFunc-exp\', calcFunc-expm1\')
(calcFunc-sin\', calcFunc-cos\', calcFunc-tan\', calcFunc-sec\')
(calcFunc-csc\', calcFunc-cot\', calcFunc-arcsin\')
(calcFunc-arccos\', calcFunc-arctan\', calcFunc-sinh\')
(calcFunc-cosh\', calcFunc-tanh\', calcFunc-sech\')
(calcFunc-csch\', calcFunc-coth\', calcFunc-arcsinh\')
(calcFunc-arccosh\', calcFunc-arctanh\', calcFunc-bern\'2)
(calcFunc-euler\'2, calcFunc-gammag\'2, calcFunc-gammaG\'2)
(calcFunc-gammaP\'2, calcFunc-gammaQ\'2, calcFunc-betaB\')
(calcFunc-betaI\', calcFunc-erf\', calcFunc-erfc\')
(calcFunc-besJ\'2, calcFunc-besY\'2, calcFunc-sum)
(calcFunc-prod, calcFunc-integ, calcFunc-if, calcFunc-subscr)
(math-do-integral, calcFunc-integ, math-decompose-poly)
(math-solve-system-rec, math-solve-system-subst, math-solve-for)
(calcFunc-inv, calcFunc-sqrt, calcFunc-conj, calcFunc-abs)
(calcFunc-deg, calcFunc-rad, calcFunc-ln, calcFunc-log10)
(calcFunc-lnp1, calcFunc-exp, calcFunc-expm1, calcFunc-sin)
(calcFunc-cos, calcFunc-tan, calcFunc-arcsin, calcFunc-arccos)
(calcFunc-arctan, calcFunc-sinh, calcFunc-cosh, calcFunc-tanh)
(calcFunc-arcsinh, calcFunc-arccosh, calcFunc-arctanh):
* lisp/calc/calcalg3.el (calc-get-fit-variables)
(calcFunc-polint, calcFunc-ratint, math-all-vars-but): Don't quote
lambdas.

Don't quote lambdas in eshell/*.el

* lisp/eshell/em-basic.el (eshell-echo):
* lisp/eshell/em-cmpl.el (eshell-command-completion-function)
(eshell-default-completion-function, eshell-cmpl-initialize)
(eshell-complete-parse-arguments, eshell-complete-commands-list):
* lisp/eshell/em-dirs.el (eshell-complete-user-reference):
* lisp/eshell/em-hist.el (eshell-hist-unload-hook)
(eshell-hist-initialize):
* lisp/eshell/em-ls.el (eshell-ls-sort-entries):
* lisp/eshell/em-pred.el (eshell-modifier-alist)
(eshell-display-predicate-help, eshell-display-modifier-help)
(eshell-pred-substitute, eshell-split-members):
* lisp/eshell/em-prompt.el (eshell-prompt-function):
* lisp/eshell/em-smart.el (eshell-smart-unload-hook)
(eshell-smart-initialize, eshell-refresh-windows):
* lisp/eshell/em-unix.el (eshell-shuffle-files):
* lisp/eshell/esh-arg.el (eshell-parse-argument-hook):
* lisp/eshell/esh-cmd.el (eshell-cmd-initialize)
(eshell-parse-command):
* lisp/eshell/esh-mode.el (eshell-preinput-scroll-to-bottom)
(eshell-postoutput-scroll-to-bottom):
* lisp/eshell/esh-module.el (eshell-modules-list):
* lisp/eshell/esh-proc.el (eshell-read-process-name)
(eshell-round-robin-kill):
* lisp/eshell/esh-var.el (eshell-envvar-names)
(eshell-variables-list): Don't quote lambdas.

; * lisp/emacs-lisp/benchmark.el (benchmark-run): Fix docstring

; * lib-src/make-fingerprint.c: Update commentary.

New user options 'copy-region-blink-delay' and 'delete-pair-blink-delay'

* lisp/emacs-lisp/lisp.el (delete-pair-blink-delay): New defcustom.
(delete-pair): Use it.  (Bug#4136)

* lisp/simple.el (copy-region-blink-delay): New defcustom.
(indicate-copied-region): Use it.  (Bug#42865)
Thanks to Sean Whitton <spwhitton@spwhitton.name>.
(indicate-copied-region): Use 'query-replace-descr' not to show
newlines literally.  Use "Copied text" instead of misleading
"Saved text" (bug#42865).

Reformat argument commentary in etags.c

* lib-src/etags.c (pfnote, consider_token, C_entries): Resurrect
original format of comments to function arguments.

Reformat comment for 'gnu' compilation rule

* lisp/progmodes/compile.el (compilation-error-regexp-alist-alist):
The comments above the regexp for the 'gnu' rule contained
references to the previous string regexp, which has been difficult
to follow ever since the translation to rx.  Move the comments
to their proper places, and add some guiding notes.

Make the invocation of combine-change-calls in comment-region valid

This fixes bug #44581.  The problem was that whitespace outside of the (BEG
END) region was being deleted, and this made the invocation of
combine-change-calls with (BEG END) invalid.

* lisp/newcomment.el (comment-region-default): Amend the second argument to
combine-change-calls.

* lisp/progmodes/cc-langs.el (c-<>-notable-chars-re): Fix wrong '-' in regexp

Make initial frame match frame-title-format

* src/xterm.c (x_term_init):
* src/w32term.c (w32_initialize_display_info): Sync initial frame
title with new value of Vframe_title_format.
Problem reported by Angelo Graziosi <angelo.g0@libero.it>.

Run menu-item :filter function before showing binding

* lisp/help.el (describe-map): Fix running `menu-item' :filter
functions.  This fixes a mistake in the previous conversion of this
defun from the old C function describe_map.  See the discussion in
Bug#39149.
* test/src/keymap-tests.el
(keymap---get-keyelt/runs-menu-item-filter)
(describe-buffer-bindings/menu-item-filter-show-binding)
(describe-buffer-bindings/menu-item-filter-hide-binding):
New tests.
(keymap-tests--test-menu-item-filter): New defun.

Handle negation of search keys in gnus-search minibuffer completion

* lisp/gnus/gnus-search.el (gnus-search-get-active): Keys might start
with a leading "-": check for that and ignore it.

* lisp/progmodes/xref.el (xref-goto-xref): Prefix arg quits the *xref* buffer.

(bug#44611)

* lisp/org/ob-ruby.el (org-babel-ruby-initiate-session): Use :ruby header arg.

Allow specification of ruby command using the :ruby header arg.
https://lists.gnu.org/archive/html/emacs-orgmode/2020-11/msg00166.html

Fix `speedbar-directory-buttons' when using Tramp

* lisp/speedbar.el (speedbar-directory-buttons): Make speedbar
work with directories accessed via Tramp (bug#44622).

Copyright-paperwork-exempt: yes

Don't quote lambdas in several places

* lisp/align.el (align-highlight-rule):
* lisp/bookmark.el (bookmark-maybe-sort-alist):
* lisp/emacs-lisp/advice.el (ad-read-advice-name)
(ad-retrieve-args-form, ad-make-hook-form, defadvice)
(ad-with-originals):
* lisp/foldout.el (foldout-inhibit-key-bindings):
* lisp/gnus/gnus-bookmark.el (gnus-bookmark-maybe-sort-alist):
* lisp/mail/rfc822.el (rfc822-addresses-1):
* lisp/net/eudcb-ldap.el (eudc-ldap-cleanup-record-simple):
* lisp/net/net-utils.el (network-connection-to-service):
* lisp/net/socks.el (socks-build-auth-list):
* lisp/org/ox-odt.el (org-odt--image-size):
* lisp/pcomplete.el (pcomplete-command-completion-function)
(pcomplete-default-completion-function, pcomplete-opt):
* lisp/progmodes/cperl-mode.el (cperl-highlight-charclass)
(cperl-tags-hier-init, cperl-tags-treeify)
(cperl-next-interpolated-REx, cperl-time-fontification):
* lisp/shadowfile.el (shadow-copy-files, shadow-shadows-of-1)
(shadow-save-buffers-kill-emacs):
* lisp/strokes.el (strokes-renormalize-to-grid):
* lisp/tempo.el (tempo-insert, tempo-forward-mark)
(tempo-backward-mark):
* lisp/textmodes/artist.el (artist-submit-bug-report):
* lisp/textmodes/ispell.el (ispell-complete-word):
* lisp/url/url-auth.el (url-get-authentication):
* lisp/url/url-cache.el (url-cache-create-filename-human-readable):
* lisp/vcursor.el (vcursor-find-window):
* test/lisp/textmodes/reftex-tests.el
(reftex-parse-bibtex-entry-test): Don't quote lambdas.

Work around glib messing with signal handlers more than it should

* src/process.c (init_process_emacs): force glib's g_unix_signal
handler into lib_child_handler where it should belong.

Copyright-paperwork-exempt: yes

Add an option to preserve ANSI sequences

* lisp/ansi-color.el Add an option to preserve the ANSI sequences
* test/lisp/ansi-color-tests.el: Add tests (bug#44589).

project-or-external-find-file doc string fix

* lisp/progmodes/project.el (project-or-external-find-file): Doc
string fix -- it's not "recognizing" file names (bug#44588).

Use lexical-binding in fortune.el and add tests

* lisp/play/fortune.el: Use lexical-binding.  Remove redundant
:group args.
(fortune-in-buffer): Quote function symbol as such.
* test/lisp/play/fortune-resources/fortunes:
* test/lisp/play/fortune-tests.el: New files.
* .gitignore: Ignore generated file fortunes.dat.

; Update the expected result files in test/manual/etags.

Update the various INSTALL files

* nt/INSTALL.W64:
* nt/INSTALL:
* INSTALL: Update the installation information, in particular the
fact that HarfBuzz is now preferred as the shaping library.

Don't leave lock files after 'replace-buffer-contents'

* src/editfns.c (Freplace_buffer_contents): Unlock the buffer's
file if no changes have been made.  (Bug#44303)

(cherry picked from commit a5867ddfbd721568005175bf6c725f7834b21ea4)

Fix input method translation near read-only text

* lisp/international/quail.el (quail-input-method): Don't disable
input method when the character after point has the read-only
property.  Suggested by Evgeny Zajcev <lg.zevlg@gmail.com>
(Bug#44466)

* doc/emacs/mule.texi (Input Methods): Document that input methods
are inhibited in read-only text.

Make Calc windows dedicated by default

* lisp/calc/calc.el (calc-make-windows-dedicated): New defcustom.
(calc, calc-trail-display): Set Calc windows dedicated if
calc-make-windows-dedicated is non-nil.  Patch by Boruch Baum
<boruch_baum@gmx.com>.  (Bug#44108)

* etc/NEWS (Calc): Announce the new behavior.

Make 'prefer-utf-8' heed inhibit-*-detection variables

* lisp/international/mule-conf.el (prefer-utf-8): Inhibit
detection of null bytes and ISO escape sequences if the respective
inhibit-*-detection variables say so.  (Bug#44486)

Merge branch 'master' of git.savannah.gnu.org:/srv/git/emacs

* lisp/faces.el (mode-line-highlight): Use :box only when supported.

Capitalize portable dump messages.

We capitalize all other messages during the dump, so capitalize the
"dump mode" and "dumping fingerprint" ones as well for consistency.

* src/pdumper.c (Fdump_emacs_portable): Capitalize fingerprint message
prefix.

* lisp/loadup.el: Capitalize "dump mode" message.

Face-changing text properties and help-echo now work with xterm-mouse.

* src/dispnew.c (update_mouse_position): New function for mouse
movement logic in 'handle_one_term_event' that can be shared across
different mouse backends.
(display--update-for-mouse-movement): New lisp function, call it.
* lisp/xt-mouse.el (xterm-mouse--handle-mouse-movement): New function
that calls 'display--update-for-mouse-movement'.
(xterm-mouse-translate-1): Call it.
* src/term.c (handle_one_term_event): Inline logic from
'term_mouse_movement' and call 'update_mouse_position'.
(term_mouse_movement): Delete.

Fix display of truncated R2L lines on TTY frames

* src/xdisp.c (extend_face_to_end_of_line): Use a while-loop, not
a do-while loop, to avoid appending an extra glyph at the end of a
line that is one character shorter than the window-width.  This is
needed to fix display of reversed glyph rows that are almost as
wide as the window, because append_space_for_newline already added
one space glyph.

Avoid crashes when a reversed glyph row starts with a composition

* src/dispnew.c (build_frame_matrix_from_leaf_window): Add an
assertion to prevent us from overwriting non-char glyphs with the
vertical border glyph.
* src/xdisp.c (extend_face_to_end_of_line): Account for one glyph
possibly inserted by append_space_for_newline.  (Bug#44506)
Remove a kludgey correction for an off-by-one error in column
counting, which is no longer needed.

Save instantiated gnus-search engines in an alist

So we aren't re-instantiating (and potentially configuring) them with
every search.

* lisp/gnus/gnus-search.el (gnus-search-engine-instance-alist): New
variable holding server->engine mapping.
(gnus-search-server-to-engine): See if we've already instantiated this
server. If so, return it. If not, instantiate it and save in the above
variable.
(gnus-search-shutdown): Shutdown function clearing the above alist.

Make sure Gnus search groups search topics recursively

* lisp/gnus/gnus-group.el (gnus-group-make-search-group,
gnus-group-read-ephemeral-search-group): If a search is initiated from
a topic line, make sure we get all the groups under that topic (and
under sub-topics).

; * .gitignore: src/fingerprint.c not generated since 2019-04-09.

Simplify quick-check composition regexps

* lisp/international/ucs-normalize.el
(quick-check-composition-list-to-regexp): Don't add an explicit
pattern for U+1161..U+1175 and U+11a8..U+11c2 since these are already
part of `combining-chars'.

Merge from origin/emacs-27

a3d316bbb7 (origin/emacs-27) Update information about refcards
f43e9ad524 Avoid crashes in the daemon due to user interaction

; Merge from origin/emacs-27

The following commit was skipped:

658952a57a Some minor changes to Tramp, do not merge with master

Merge from origin/emacs-27

ac1a2b2160 Add more doc-view requirements
109eb1e7e2 Fix undefined behavior when fetching glyphs from the displ...

# Conflicts:
# lisp/doc-view.el

; Merge from origin/emacs-27

The following commit was skipped:

78e1646bf7 Fix pcase rx form snag with '?' and '??' (bug#44532)

Merge from origin/emacs-27

75384bd155 Update the doc-view header line
13ab70c80e Avoid breaking Arabic shaping in 'window-text-pixel-size'
e693d97e50 doc-view.el comment clarification
968e85a2ce Update erc documentation about C-c C-b

Fix error with fn key in NS port (bug#44533)

* src/nsterm.m ([EmacsView keyDown:]): Move the correction for fn key
handling to before the modifiers are calculated.

Some minor Tramp fixes, resulting from test campaign

* lisp/net/tramp.el (tramp-handle-write-region):
* lisp/net/tramp-adb.el (tramp-adb-handle-write-region):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/net/tramp-smb.el (tramp-smb-handle-write-region): Use `current-time'
if needed.

* lisp/net/tramp-gvfs.el (tramp-gvfs-gio-mapping):
(tramp-gvfs-do-copy-or-rename-file): Remove "gvfs-rename", it is
not trustworthy.

* test/lisp/net/tramp-tests.el (tramp-test07-file-exists-p): Check also for
symlinked files in trash.
(tramp-test20-file-modes): Revert last change, it was a thinko.

Update information about refcards

* admin/release-process (refcards):
* admin/make-tarball.txt (refcards): Update information about
generating refcards and required TeX/LaTeX packages.

Don't quote lambdas in several places

* lisp/allout-widgets.el (allout-widgets-adjusting-message)
(allout-widgets-exposure-change-processor)
(allout-widgets-count-buttons-in-region):
* lisp/ansi-color.el (ansi-color-make-color-map):
* lisp/case-table.el (describe-buffer-case-table):
* lisp/emacs-lisp/byte-opt.el (byte-decompile-bytecode-1):
* lisp/gnus/gnus-agent.el (gnus-agent-regenerate-group):
* lisp/gnus/nnir.el (nnir-run-swish++, nnir-run-swish-e)
(nnir-run-hyrex, nnir-run-namazu):
* lisp/hippie-exp.el (make-hippie-expand-function)
(try-complete-lisp-symbol, try-complete-lisp-symbol-partially)
(try-expand-all-abbrevs):
* lisp/international/mule-cmds.el (sort-coding-systems)
(select-safe-coding-system, select-message-coding-system)
(read-language-name, encoded-string-description):
* lisp/international/quail.el (quail-keyseq-translate)
(quail-get-translations, quail-build-decode-map)
(quail-insert-decode-map):
* lisp/jka-compr.el (jka-compr-uninstall):
* lisp/locate.el (locate-in-alternate-database):
* lisp/mail/mailabbrev.el (mail-resolve-all-aliases-1)
(mail-abbrev-make-syntax-table):
* lisp/mh-e/mh-seq.el (mh-read-folder-sequences):
* lisp/net/eudcb-ldap.el (eudc-ldap-simple-query-internal):
* lisp/progmodes/make-mode.el (makefile-query-targets)
(makefile-prompt-for-gmake-funargs):
* lisp/shadowfile.el (shadow-cancel, shadow-shadows-of):
* lisp/sort.el (sort-pages, sort-fields, sort-regexp-fields):
* lisp/subr.el (listify-key-sequence):
* lisp/term/wyse50.el (terminal-init-wyse50):
* lisp/textmodes/ispell.el (ispell-help)
(ispell-begin-tex-skip-regexp):
* lisp/textmodes/page-ext.el (pages-sort-region):
* lisp/textmodes/refer.el (refer-find-entry-in-file):
* lisp/url/url-expand.el (url-expand-file-name): Don't quote lambdas.

Add help-char to the cache key in read-char-from-minibuffer as well

It's highly unlikely that help-char will be changed from its default value 8,
but formally there is a dependence on help-char.

Emit required version when Harfbuzz is not found but Cairo is

* configure.ac: Define harfbuzz_required_ver with required
harfbuzz version, and put it in the warning message emitted when
Cairo is found but not HarfBuzz.

vhdl-mode: remove minor obstacle to static checking

* lisp/progmodes/vhdl-mode.el (vhdl-directive-keywords-regexp):
Remove unnecessary global variable.
(vhdl-words-init): Remove assignment.
(vhdl-font-lock-init): Inline expression.  Use regexp-opt.

Remove mention of `edebug-on-signal' from a doc string

* lisp/emacs-lisp/edebug.el (edebug-mode): Don't mention
non-existent user option (bug#44577).

Clarify project-find-file doc string

* lisp/progmodes/project.el (project-find-file): Don't say
anything about recognizing file names, as that may lead the user
to think that it'll check whether the string at point is an
existing file (bug#44588).

Add help-form to the cache key in read-char-from-minibuffer

* test/lisp/help-fns-tests.el: Silence byte-compiler.

* test/lisp/hfy-cmap-resources/rgb.txt: Add comment line.

Remove redundant installation instructions

* lisp/net/newsticker.el:
* lisp/net/sieve-mode.el:
* lisp/play/bubbles.el:
* lisp/play/handwrite.el:
* lisp/progmodes/python.el:
* lisp/progmodes/ruby-mode.el:
* lisp/whitespace.el: Remove redundant installation instructions.
These packages are distributed with Emacs and/or GNU ELPA.
* lisp/calendar/timeclock.el:
* lisp/ehelp.el:
* lisp/emacs-lisp/checkdoc.el:
* lisp/filesets.el:
* lisp/mail/reporter.el:
* lisp/net/rfc2104.el:
* lisp/net/webjump.el:
* lisp/pixel-scroll.el: Remove redundant recommendation to call
require before using autoloaded functions.
* lisp/tar-mode.el: Remove reference to package uncompress, removed in
Emacs 23.

* lisp/progmodes/ruby-mode.el (auto-mode-alist): Add Brewfile.

Fix mistake in describe-buffer-bindings

* src/keymap.c (Fdescribe_buffer_bindings): Fix a call in
describe-buffer-bindings.  This fixes a mistake in my previous commit
to prefer the Lisp version of describe-map-tree (8a1441310aa1), where
0 was accidentally converted to Qt in two places.

Use cache with help-char in read-char-from-minibuffer unless help-form is nil

Avoid crashes in the daemon due to user interaction

* src/minibuf.c (read_minibuf): Avoid crashes in the daemon if the
init file invokes some kind of minibuffer interaction, by not
updating the selected frame if it's the initial frame.
(Bug#44583)

In dired-query use read-char-from-minibuffer with bound help-char (bug#42708)

* lisp/dired-aux.el (dired-query): Replace read-char-choice call
with read-char-from-minibuffer.

* lisp/subr.el (read-char-choice): Restore the previous version
that uses read-key.
(read-char-from-minibuffer): Bind help-char to help-form-show
when help-form is non-nil.

Remove unused "internal" gnus-search variables

* lisp/gnus/gnus-search.el (gnus-search-memo-query,
gnus-search-memo-server): No longer needed.

Fix defgeneric name of gnus-search-index(ed)-extract

* lisp/gnus/gnus-search.el (gnus-search-indexed-extract): Had the
wrong name on the generic.

Some minor changes to Tramp, do not merge with master

* lisp/net/tramp.el (tramp-handle-directory-files)
(tramp-handle-directory-files-and-attributes):
* lisp/net/tramp-adb.el
(tramp-adb-handle-directory-files-and-attributes):
* lisp/net/tramp-rclone.el (tramp-rclone-handle-directory-files):
* lisp/net/tramp-sh.el (tramp-sh-handle-directory-files-and-attributes):
* lisp/net/tramp-smb.el (tramp-smb-handle-directory-files): Add _COUNT.
Make the functions forward compatible.

* lisp/net/tramp-gvfs.el (tramp-gvfs-enabled):
Increase `max-specpdl-size' temporarily.

* test/lisp/net/tramp-tests.el (tramp--test-share-p): New defun.
(tramp-test05-expand-file-name-relative): Use it.

Fix python-font-lock-keywords-maximum-decoration performance regression

* lisp/progmodes/python.el
(python-font-lock-keywords-maximum-decoration): `symbol-name'
should not be quantified by a `+' as it is redundant and performs
very badly (bug#44572).