Merge from origin/emacs-26

a427de9 (origin/emacs-26) Fix bug #11732
3a04e15 Improve documentation of 'emacs-lock-mode'
9d6ca5a * lisp/imenu.el (imenu-generic-expression): Doc fix.  (Bug#32...
fdd7e7d Improve indexing of 'eval-defun' in ELisp manual
10af989 Fix (length CIRCULAR) documentation
271d1f7 Tramp editorials
4abf94f Clarify and improve doc strings of 'eval-last-sexp' and friends
6cfc7a7 Automate upload of Emacs manuals to gnu.org
b73cde5 Fix MH-E mail composition with GNU Mailutils (SF#485)
0dce5e5 Speed up 'replace-buffer-contents' some more
00fdce0 * doc/emacs/docstyle.texi: Avoid messing up the html output.

Conflicts:
	admin/make-tarball.txt

admin/admin.el

@@ -261,8 +261,12 @@ ROOT should be the root of an Emacs source tree."
 ROOT should be the root of an Emacs source tree.
 Interactively with a prefix argument, prompt for TYPE.
 Optional argument TYPE is type of output (nil means all)."
-  (interactive (let ((root (read-directory-name "Emacs root directory: "
-						source-directory nil t)))
+  (interactive (let ((root
+                      (if noninteractive
+                          (or (pop command-line-args-left)
+                              default-directory)
+                        (read-directory-name "Emacs root directory: "
+                                             source-directory nil t))))
 		 (list root
 		       (if current-prefix-arg
 			   (completing-read
@@ -717,8 +721,12 @@ style=\"text-align:left\">")
 ROOT should be the root of an Emacs source tree.
 Interactively with a prefix argument, prompt for TYPE.
 Optional argument TYPE is type of output (nil means all)."
-  (interactive (let ((root (read-directory-name "Emacs root directory: "
-						source-directory nil t)))
+  (interactive (let ((root
+                      (if noninteractive
+                          (or (pop command-line-args-left)
+                              default-directory)
+                        (read-directory-name "Emacs root directory: "
+                                             source-directory nil t))))
 		 (list root
 		       (if current-prefix-arg
 			   (completing-read

admin/make-manuals

@@ -0,0 +1,214 @@
+#!/bin/bash
+### make-manuals - create the Emacs manuals to upload to the gnu.org website
+
+## Copyright 2018 Free Software Foundation, Inc.
+
+## Author: Glenn Morris <rgm@gnu.org>
+
+## This file is part of GNU Emacs.
+
+## GNU Emacs is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+
+## GNU Emacs is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+
+## You should have received a copy of the GNU General Public License
+## along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+### Commentary:
+
+## This is a helper script to create the Emacs manuals as used on the
+## gnu.org website.  After this, use upload-manuals to upload them.
+##
+## Usage:
+## Call from the top-level directory of an Emacs source tree.
+## This should normally be a release.
+## The info files should exist.
+
+### Code:
+
+die ()                          # write error to stderr and exit
+{
+    [ $# -gt 0 ] && echo "$PN: $@" >&2
+    exit 1
+}
+
+PN=${0##*/}                     # basename of script
+
+usage ()
+{
+    cat 1>&2 <<EOF
+Usage: ${PN} [-c] [-e emacs]
+Create the Emacs manuals for the gnu.org website.
+Call this script from the top-level of the Emacs source tree that
+contains the manuals you want to use (normally a release).
+The admin/ directory is required.
+Options:
+-c: do not delete any pre-existing $outdir/ directory
+-e: Emacs executable to use (default $emacs)
+EOF
+    exit 1
+}
+
+
+## Defaults.
+continue=
+emacs=emacs
+
+## Parameters.
+outdir=manual
+gzip="gzip --best --no-name"
+tar="tar --numeric-owner --owner=0 --group=0 --mode=go+u,go-w"
+## Requires GNU tar >= 1.28 so that the tarballs are more reproducible.
+## (Personally I think this is way OOT.  I'm not even sure if anyone
+## uses these tarfiles, let alone cares whether they are reproducible.)
+tar --help | grep -- '--sort.*name' >& /dev/null && tar="$tar --sort=name"
+
+while getopts ":hce:" option ; do
+    case $option in
+        (h) usage ;;
+
+        (c) continue=t ;;
+
+        (e) emacs=$OPTARG ;;
+
+        (\?) die "Bad option -$OPTARG" ;;
+
+        (:) die "Option -$OPTARG requires an argument" ;;
+
+        (*) die "getopts error" ;;
+    esac
+done
+shift $(( --OPTIND ))
+OPTIND=1
+
+[ $# -eq 0 ] || usage
+
+
+[ -e admin/admin.el ] || die "admin/admin.el not found"
+
+
+tempfile=/tmp/$PN.$$
+trap "rm -f $tempfile 2> /dev/null" EXIT
+
+
+[ "$continue" ] || rm -rf $outdir
+
+if [ -e $outdir ]; then
+    ## Speed up repeat invocation.
+    echo "Re-using existing $outdir/ directory"
+
+else
+
+    ## This creates the manuals in a manual/ directory.
+    ## Note makeinfo >= 5 is much slower than makeinfo 4.
+    echo "Making manuals (slow)..."
+    $emacs --batch -Q -l admin/admin.el -f make-manuals \
+              >| $tempfile 2>&1 || {
+        cat $tempfile 1>&2
+
+        die "error running make-manuals"
+    }
+fi
+
+find $outdir -name '*~' -exec rm {} +
+
+
+echo "Adding compressed html files..."
+for f in emacs elisp; do
+    $tar -C $outdir/html_node -cf - $f | $gzip \
+       > $outdir/$f.html_node.tar.gz || die "error for $f"
+done
+
+
+echo "Making manual tarfiles..."
+$emacs --batch -Q -l admin/admin.el -f make-manuals-dist \
+          >| $tempfile || {
+
+    cat $tempfile 1>&2
+
+    die "error running make-manuals-dist"
+}
+
+o=$outdir/texi
+mkdir -p $o
+
+for f in $outdir/*.tar; do
+    of=${f##*/}
+    of=${of#emacs-}
+    of=${of%%-[0-9]*}.texi.tar
+    of=${of/lispintro/eintr}
+    of=${of/lispref/elisp}
+    of=${of/manual/emacs}
+    of=$o/$of
+    mv $f $of
+    $gzip $of || die "error compressing $f"
+done
+
+
+echo "Making refcards..."
+make -C etc/refcards dist >| $tempfile 2>&1 || {
+    cat $tempfile 1>&2
+    die "failed make dist"
+}
+
+## This may hang if eg german.sty is missing.
+make -k -C etc/refcards pdf >| $tempfile 2>&1 || {
+    cat $tempfile 1>&2
+    echo "Warning: ignored failure(s) from make pdf"
+}
+
+## Newer Texlive only provide mex (used by pl refcards) for pdf, AFAICS.
+make -k -C etc/refcards ps >| $tempfile 2>&1 || {
+    cat $tempfile 1>&2
+    echo "Warning: ignored failure(s) from make ps"
+}
+
+## Note that in the website, refcards/ is not a subdirectory of manual/.
+refdir=$outdir/refcards
+
+mkdir -p $refdir
+
+mv etc/refcards/emacs-refcards.tar $refdir
+$gzip $refdir/emacs-refcards.tar
+
+for fmt in pdf ps; do
+
+    o=$refdir/$fmt
+
+    mkdir -p $o
+
+    [ $fmt = pdf ] && {
+        cp etc/refcards/*.$fmt $o
+        rm $o/gnus-logo.pdf
+        continue
+    }
+
+    for f in  etc/refcards/*.$fmt; do
+        $gzip < $f > $o/${f##*/}.gz
+    done
+done
+
+make -C etc/refcards extraclean > /dev/null
+
+
+echo "Adding compressed info files..."
+
+o=$outdir/info
+mkdir -p $o
+
+for f in eintr.info elisp.info emacs.info; do
+
+    $gzip < info/$f > $o/$f.gz || die "error for $f"
+done
+
+
+echo "Finished OK, you might want to run upload-manuals now"
+
+
+exit 0

admin/make-tarball.txt

@@ -202,50 +202,14 @@ The pages to update are:
 
 emacs.html (for a new major release, a more thorough update is needed)
 history.html
+add the new NEWS file as news/NEWS.xx.y
 
 For every new release, a banner is displayed on top of the emacs.html
 page.  Uncomment and the release banner in emacs.html.  Keep it on the
 page for about a month, then comment it again.
 
-Use M-x make-manuals from admin/admin.el to regenerate the html
-manuals in manual/.  If there are new manuals, add appropriate index
-pages in manual/ and add them to manual/index.html.  In the
-manual/html_node directory, delete any old manual pages that are no
-longer present.
-
-Tar up the generated html_node/emacs/ and elisp/ directories and update
-the files manual/elisp.html_node.tar.gz and emacs.html_node.tar.gz.
-Use GNU Tar 1.28 or later so that the tarballs are more reproducible,
-as follows:
-
-  cd manual
-  tar='tar --numeric-owner --owner=0 --group=0 --mode=go+u,go-w --sort=name'
-  gzip='gzip --best --no-name'
-  $tar -cf - html_node/emacs | $gzip >emacs.html_node.tar.gz
-  $tar -cf - html_node/elisp | $gzip >elisp.html_node.tar.gz
-
-Use M-x make-manuals-dist from admin/admin.el to update the
-manual/*.tar files.
-
-Add compressed copies of the main info pages from the tarfile to manual/info/
-as follows:
-
-  cd manual
-  mkdir info
-  gzip --best --no-name <../info/eintr.info >info/eintr.info.gz
-  gzip --best --no-name <../info/elisp.info >info/elisp.info.gz
-  gzip --best --no-name <../info/emacs.info >info/emacs.info.gz
-
-Update the refcards/pdf/ and ps/ directories, and also
-refcards/emacs-refcards.tar.gz (use make -C etc/refcards pdf ps dist).
-
-FIXME: The above instructions are not quite complete, as they do not
-specify the manual procedure used to copy the generated files in the
-'manual' directory to the corresponding web files, and to cvs remove
-and add files as needed.  Also, they are missing some files, e.g.,
-they generate manual/html_mono/ada-mode.html but do not generate the
-top-level ada-mode.html file for the one-node-per-page version; this
-is currently done by hand.
+Regenerate the various manuals in manual/.
+The scripts admin/make-manuals and admin/upload-manuals summarize the process.
 
 Browsing <https://web.cvs.savannah.gnu.org/viewvc/?root=emacs> is one
 way to check for any files that still need updating.

admin/upload-manuals

@@ -0,0 +1,376 @@
+#!/bin/bash
+
+### upload-manuals - upload the Emacs manuals to the gnu.org website
+
+## Copyright 2018 Free Software Foundation, Inc.
+
+## Author: Glenn Morris <rgm@gnu.org>
+
+## This file is part of GNU Emacs.
+
+## GNU Emacs is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+
+## GNU Emacs is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+
+## You should have received a copy of the GNU General Public License
+## along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+### Commentary:
+
+## Run this on the output of make-manuals.
+
+## We assume you have already checked out a local copy of the website
+## following the instructions at
+## https://savannah.gnu.org/cvs/?group=emacs
+
+## Usage:
+## Call from the manual/ directory created by make-manual.
+## upload-manuals /path/to/cvs/checkout
+
+### Code:
+
+
+die ()                          # write error to stderr and exit
+{
+    [ $# -gt 0 ] && echo "$PN: $@" >&2
+    exit 1
+}
+
+PN=${0##*/}                     # basename of script
+
+usage ()
+{
+    cat 1>&2 <<EOF
+Usage: ${PN} [-m message] [-n] /path/to/cvs/checkout
+Upload the Emacs manuals to the gnu.org website.
+Call this script from the manual/ directory created by make-manuals.
+This script destructively modifies the source directory.
+Options:
+-m: commit message to use (default "$message")
+-n: dry-run (do not commit files)
+EOF
+    exit 1
+}
+
+
+## Parameters
+version=$(gunzip -c info/emacs.info.gz 2> /dev/null | sed -n '0,/updated for Emacs version/s/.*updated for Emacs version \([0-9.]*\).*\.$/\1/p')
+
+## Defaults
+cvs=cvs
+message="Regenerate manuals for Emacs $version"
+umessage=
+
+while getopts ":hm:n" option ; do
+    case $option in
+        (h) usage ;;
+
+        (m) umessage=t ; message="$OPTARG" ;;
+
+        (n) cvs="echo $cvs" ;;
+
+        (\?) die "Bad option -$OPTARG" ;;
+
+        (:) die "Option -$OPTARG requires an argument" ;;
+
+        (*) die "getopts error" ;;
+    esac
+done
+shift $(( --OPTIND ))
+OPTIND=1
+
+[ $# -eq 1 ] || usage
+
+[ "$version$umessage" ] || \
+    die "Could not get version to use for commit message"
+
+webdir=$1
+
+[ -e $webdir/CVS/Entries ] && [ -e $webdir/refcards/pdf/refcard.pdf ] || \
+    die "$webdir does not look like a checkout of the Emacs webpages"
+
+[ -e html_mono/emacs.html ] && [ -e html_node/emacs/index.html ] || \
+    die "Current directory does not like the manual/ directory"
+
+
+echo "Doing refcards..."
+
+mv refcards/emacs-refcards.tar.gz $webdir/refcards/
+(
+    cd $webdir/refcards
+    $cvs commit -m "$message" emacs-refcards.tar.gz || die "commit error"
+)
+
+## For refcards, we assume a missing file is due to a tex failure,
+## rather than a refcard that should be deleted.
+for fmt in pdf ps.gz; do
+
+    clist=
+
+    for f in $webdir/refcards/${fmt%.gz}/*.$fmt; do
+
+        s=${f#$webdir/}
+
+        if [ -e $s ]; then
+            mv $s $f
+            clist="$clist ${f##*/}"
+        else
+            echo "$s seems to be missing"
+        fi
+    done
+
+
+    ## Check for new files.
+    new=
+    for f in refcards/${fmt%.gz}/*.$fmt; do
+        [ -e $f ] || break
+        new="$new $f"
+        clist="$clist ${f##*/}"
+    done
+
+    [ "$new" ] && mv $new $webdir/refcards/${fmt%.gz}/
+
+    [ "$clist" ] && (
+        cd $webdir
+        [ "$new" ] && {
+            echo "Adding new files: $new"
+            $cvs add -kb $new || die "add error"
+            echo "Remember to add new refcards to refcards/index.html"
+        }
+        cd refcards/${fmt%.gz}
+        $cvs commit -m "$message" $clist || die "commit error"
+    )
+
+done                            # $fmt
+
+
+echo "Doing non-html manuals..."
+
+for fmt in info pdf ps texi; do
+
+    clist=
+
+    for f in $webdir/manual/$fmt/*; do
+
+        [ ${f##*/} = CVS ] && continue
+
+        s=$fmt/${f##*/}
+
+        if [ -e $s ]; then
+            mv $s $f
+            clist="$clist ${f##*/}"
+        else
+            case ${f##*/} in
+                *_7x9*.pdf) continue ;;
+            esac
+
+            echo "$s seems to be missing"
+        fi
+    done
+
+    ## Check for new files.
+    new=
+    for f in $fmt/*.$fmt*; do
+        [ -e $f ] || break
+        new="$new $f"
+        clist="$clist ${f##*/}"
+    done
+
+    [ "$new" ] && mv $new $webdir/manual/$fmt/
+
+    [ "$clist" ] && (
+        cd $webdir/manual
+        [ "$new" ] && {
+            echo "Adding new files: $new"
+            $cvs add $new || die "add error"
+            echo "Remember to add new files to the appropriate index pages"
+        }
+        cd $fmt
+        $cvs commit -m "$message" $clist || die "commit error"
+    )
+
+done
+
+
+echo "Doing tarred html..."
+
+clist=
+
+for f in $webdir/manual/*html*.tar*; do
+
+    s=${f##*/}
+
+    if [ -e $s ]; then
+        mv $s $f
+        clist="$clist ${f##*/}"
+    else
+        echo "$s seems to be missing"
+    fi
+done
+
+## Check for new files.
+new=
+for f in *html*.tar*; do
+    [ -e $f ] || break
+    new="$new $f"
+    clist="$clist ${f##*/}"
+done
+
+[ "$new" ] && mv $new $webdir/manual
+
+[ "$clist" ] && (
+    cd $webdir/manual
+    [ "$new" ] && {
+        echo "Adding new files: $new"
+        $cvs add -kb $new || die "add error"
+        echo "Remember to add new files to the appropriate index pages"
+    }
+    $cvs commit -m "$message" $clist || die "commit error"
+)
+
+
+## This happens so rarely it would be less effort to do by hand...
+new_manual () {
+    local t=eww
+    local i=$webdir/manual/$t.html # template
+
+    [ -r $i ] || die "Cannot read template $i"
+
+    local name o mono title
+
+    for name; do
+
+        name=${name##*/}
+        name=${name%.html}
+
+        o=$webdir/manual/$name.html
+
+        [ -e $o ] && die "$o already exists"
+
+        mono=$webdir/manual/html_mono/$name.html
+
+        [ -r $mono ] || die "Cannot read $mono"
+
+        title=$(sed -n 's|^<title>\(.*\)</title>|\1|p' $mono)
+
+        : ${title:?}
+
+        echo "$title" | grep -qi "Emacs" || title="Emacs $title"
+        echo "$title" | grep -qi "manual" || title="$title Manual"
+
+        ## It is a pain to extract and insert a good "documenting...".
+        ## Improve it by hand if you care.
+        sed -e "s|^<title>.*\( - GNU Project\)|<title>$title\1|" \
+            -e "s|^<h2>.*|<h2>$title</h2>|" \
+            -e "s/^documenting.*/documenting \"$title\"./" \
+            -e "s/$t/$name/" \
+            -e "s/&copy;.* Free/\&copy; $(date +%Y) Free/" $i > $o
+
+        (
+            cd $webdir/manual
+            $cvs add ${o##*/} || die "add error for $o"
+        )
+    done
+
+    return 0
+}
+
+
+echo "Doing html_mono..."
+
+clist=
+
+for f in $webdir/manual/html_mono/*.html; do
+
+    s=${f##*manual/}
+
+    if [ -e $s ]; then
+        mv $s $f
+        clist="$clist ${f##*/}"
+    else
+        echo "$s seems to be missing"
+    fi
+done
+
+## Check for new files.
+new=
+for f in html_mono/*.html; do
+    [ -e $f ] || break
+    new="$new $f"
+    clist="$clist ${f##*/}"
+done
+
+[ "$new" ] && mv $new $webdir/manual/html_mono/
+
+## TODO: check for removed manuals.
+
+[ "$clist" ] && (
+    cd $webdir/manual/html_mono
+    [ "$new" ] && {
+        echo "Adding new files: $new"
+        $cvs add $new || die "add error"
+        new_manual $new || die
+        echo "Remember to add new entries to manual/index.html"
+    }
+    $cvs commit -m "$message" $clist || die "commit error"
+)
+
+
+echo "Doing html_node..."
+
+for d in html_node/*; do
+
+    [ -e $d ] || break
+
+    echo "Doing $d..."
+
+    [ -e $webdir/manual/$d ] || {
+        echo "New directory: $d"
+        mkdir $webdir/manual/$d
+        $cvs add $webdir/manual/$d || die "add error"
+    }
+
+    new=
+    for f in $d/*.html; do
+        [ -e $webdir/manual/$f ] || new="$new ${f##*/}"
+    done
+
+    stale=
+    for f in $webdir/manual/$d/*.html; do
+        [ -e ${f#$webdir/manual/} ] || stale="$stale ${f##*/}"
+    done
+
+    mv $d/*.html $webdir/manual/$d/
+
+    (
+        cd $webdir/manual/$d
+        [ "$new" ] && {
+            echo "Adding new files: $new"
+            $cvs add $new || die "add error"
+        }
+
+        [ "$stale" ] && {
+            echo "Removing stale files: $stale"
+            $cvs remove -f $stale || die "remove error"
+        }
+
+        ## -f: create a new revision even if no change.
+        $cvs commit -f -m "$message" *.html $stale || die "commit error"
+    )
+
+done
+
+
+echo "Checking for stray files..."
+find -type f
+
+
+echo "Finished"
+
+exit 0

doc/emacs/docstyle.texi

@@ -8,9 +8,11 @@
 @end ignore
 @set txicodequoteundirected
 @set txicodequotebacktick
+@iftex
 @c It turns out TeX sometimes fails to hyphenate, so we help it here
 @hyphenation{au-to-mat-i-cal-ly}
 @hyphenation{spec-i-fied}
 @hyphenation{work-a-round}
 @hyphenation{work-a-rounds}
 @hyphenation{un-marked}
+@end iftex

doc/lispref/customize.texi

@@ -321,6 +321,7 @@ If a @code{defcustom} does not specify any @code{:group}, the last group
 defined with @code{defgroup} in the same file will be used.  This way, most
 @code{defcustom} do not need an explicit @code{:group}.
 
+@cindex @code{eval-defun}, and @code{defcustom} forms
 When you evaluate a @code{defcustom} form with @kbd{C-M-x} in Emacs Lisp
 mode (@code{eval-defun}), a special feature of @code{eval-defun}
 arranges to set the variable unconditionally, without testing whether

doc/lispref/debugging.texi

@@ -336,6 +336,7 @@ which is not currently set up to break on change.
 @cindex debugger, explicit entry
 @cindex force entry to debugger
 
+@cindex @code{eval-defun}, and explicit entry to debugger
   You can cause the debugger to be called at a certain point in your
 program by writing the expression @code{(debug)} at that point.  To do
 this, visit the source file, insert the text @samp{(debug)} at the

doc/lispref/display.texi

@@ -2531,6 +2531,7 @@ However, if the customizations are subsequently removed, the
 appearance of @var{face} will again be determined by its default face
 spec.
 
+@cindex @code{eval-defun}, and @code{defface} forms
 As an exception, if you evaluate a @code{defface} form with
 @kbd{C-M-x} in Emacs Lisp mode (@code{eval-defun}), a special feature
 of @code{eval-defun} overrides any custom face specs on the face,

doc/lispref/sequences.texi

@@ -75,9 +75,9 @@ string, bool-vector, or char-table, @code{nil} otherwise.
 @anchor{Definition of length}
 This function returns the number of elements in @var{sequence}.  If
 @var{sequence} is a dotted list, a @code{wrong-type-argument} error is
-signaled.  Circular lists may cause an infinite loop.  For a
-char-table, the value returned is always one more than the maximum
-Emacs character code.
+signaled; if it is a circular list, a @code{circular-list} error is
+signaled.  For a char-table, the value returned is always one more
+than the maximum Emacs character code.
 
 @xref{Definition of safe-length}, for the related function @code{safe-length}.
 

doc/lispref/variables.texi

@@ -461,6 +461,7 @@ form occurs in a @code{let} form with lexical binding enabled), then
 @code{defvar} sets the dynamic value.  The lexical binding remains in
 effect until its binding construct exits.  @xref{Variable Scoping}.
 
+@cindex @code{eval-defun}, and @code{defvar} forms
 When you evaluate a top-level @code{defvar} form with @kbd{C-M-x} in
 Emacs Lisp mode (@code{eval-defun}), a special feature of
 @code{eval-defun} arranges to set the variable unconditionally, without

doc/misc/tramp.texi

@@ -2097,8 +2097,8 @@ installed.  Usually, it is sufficient to open the file
 @file{@trampfn{adb,,/}}.  Then you can navigate in the filesystem via
 @code{dired}.
 
-Alternatively, applications such as @code{SSHDroid} that run
-@command{sshd} process on the Android device can accept any
+Alternatively, applications such as @code{Termux} or @code{SSHDroid}
+that run @command{sshd} process on the Android device can accept any
 @option{ssh}-based methods provided these settings are adjusted:
 
 @itemize

lisp/emacs-lock.el

@@ -97,7 +97,10 @@ It can be one of the following values:
  exit   -- Emacs cannot exit while the buffer is locked
  kill   -- the buffer cannot be killed, but Emacs can exit as usual
  all    -- the buffer is locked against both actions
- nil    -- the buffer is not locked")
+ nil    -- the buffer is not locked
+
+See also `emacs-lock-unlockable-modes', which exempts buffers under
+some major modes from being locked under some circumstances.")
 (put 'emacs-lock-mode 'permanent-local t)
 
 (defvar-local emacs-lock--old-mode nil
@@ -202,7 +205,10 @@ When called from Elisp code, ARG can be any locking mode:
  kill   -- the buffer cannot be killed, but Emacs can exit as usual
  all    -- the buffer is locked against both actions
 
-Other values are interpreted as usual."
+Other values are interpreted as usual.
+
+See also `emacs-lock-unlockable-modes', which exempts buffers under
+some major modes from being locked under some circumstances."
   :init-value nil
   :lighter (""
             (emacs-lock--try-unlocking " locked:" " Locked:")

lisp/imenu.el

@@ -200,9 +200,9 @@ string (which specifies the title of a submenu into which the
 matches are put).
 REGEXP is a regular expression matching a definition construct
 which is to be displayed in the menu.  REGEXP may also be a
-function, called without arguments.  It is expected to search
-backwards.  It must return true and set `match-data' if it finds
-another element.
+function of no arguments.  If REGEXP is a function, it is
+expected to search backwards, return non-nil if it finds a
+definition construct, and set `match-data' for that construct.
 INDEX is an integer specifying which subexpression of REGEXP
 matches the definition's name; this subexpression is displayed as
 the menu item.

lisp/mh-e/mh-comp.el

@@ -927,8 +927,10 @@ CONFIG is the window configuration before sending mail."
                      (list "-form" mh-comp-formfile)))
     (setq new (make-temp-file "comp."))
     (rename-file (concat temp-folder "/" "1") new t)
-    (delete-file (concat temp-folder "/" ".mh_sequences"))
-    (delete-directory temp-folder)
+    ;; The temp folder could contain various metadata files.  Rather
+    ;; than trying to enumerate all the known files, just do a
+    ;; recursive delete on the directory.
+    (delete-directory temp-folder t)
     new))
 
 (defun mh-read-draft (use initial-contents delete-contents-file)

lisp/net/tramp-sh.el

@@ -544,7 +544,7 @@ The PATH environment variable should be set via `tramp-remote-path'.
 The TERM environment variable should be set via `tramp-terminal-type'.
 
 The INSIDE_EMACS environment variable will automatically be set
-based on the TRAMP and Emacs versions, and should not be set here."
+based on the Tramp and Emacs versions, and should not be set here."
   :group 'tramp
   :version "26.1"
   :type '(repeat string))

lisp/progmodes/elisp-mode.el

@@ -1191,11 +1191,11 @@ current buffer.
 Normally, this function truncates long output according to the
 value of the variables `eval-expression-print-length' and
 `eval-expression-print-level'.  With a prefix argument of zero,
-however, there is no such truncation.  Such a prefix argument
-also causes integers to be printed in several additional formats
-\(octal, hexadecimal, and character when the prefix argument is
--1 or the integer is `eval-expression-print-maximum-character' or
-less).
+however, there is no such truncation.
+Integer values are printed in several formats (decimal, octal,
+and hexadecimal).  When the prefix argument is -1 or the value
+doesn't exceed `eval-expression-print-maximum-character', an
+integer value is also printed as a character of that codepoint.
 
 If `eval-expression-debug-on-error' is non-nil, which is the default,
 this command arranges for all errors to enter the debugger."

lisp/simple.el

@@ -1528,9 +1528,9 @@ This affects printing by `eval-expression' (via
   :version "26.1")
 
 (defun eval-expression-print-format (value)
-  "If VALUE in an integer, return a specially formatted string.
+  "If VALUE is an integer, return a specially formatted string.
 This string will typically look like \" (#o1, #x1, ?\\C-a)\".
-If VALUE is not an integer, nil is returned.
+If VALUE is not an integer, return nil.
 This function is used by commands like `eval-expression' that
 display the result of expression evaluation."
   (when (integerp value)
@@ -1591,11 +1591,11 @@ non-nil (interactively, with a prefix argument of zero), however,
 there is no such truncation.
 
 If the resulting value is an integer, and CHAR-PRINT-LIMIT is
-non-nil (interactively, unless given a positive prefix argument)
+non-nil (interactively, unless given a non-zero prefix argument)
 it will be printed in several additional formats (octal,
 hexadecimal, and character).  The character format is only used
 if the value is below CHAR-PRINT-LIMIT (interactively, if the
-prefix argument is -1 or the value is below
+prefix argument is -1 or the value doesn't exceed
 `eval-expression-print-maximum-character').
 
 Runs the hook `eval-expression-minibuffer-setup-hook' on entering the

src/editfns.c

@@ -3139,6 +3139,9 @@ static unsigned short rbc_quitcounter;
   /* Buffers to compare.  */                    \
   struct buffer *buffer_a;                      \
   struct buffer *buffer_b;                      \
+  /* BEGV of each buffer */			\
+  ptrdiff_t beg_a;				\
+  ptrdiff_t beg_b;				\
   /* Whether each buffer is unibyte/plain-ASCII or not.  */ \
   bool a_unibyte;				\
   bool b_unibyte;				\
@@ -3222,6 +3225,8 @@ differences between the two buffers.  */)
   struct context ctx = {
     .buffer_a = a,
     .buffer_b = b,
+    .beg_a = min_a,
+    .beg_b = min_b,
     .a_unibyte = BUF_ZV (a) == BUF_ZV_BYTE (a),
     .b_unibyte = BUF_ZV (b) == BUF_ZV_BYTE (b),
     .deletions = SAFE_ALLOCA (del_bytes),
@@ -3361,8 +3366,8 @@ static bool
 buffer_chars_equal (struct context *ctx,
                     ptrdiff_t pos_a, ptrdiff_t pos_b)
 {
-  pos_a += BUF_BEGV (ctx->buffer_a);
-  pos_b += BUF_BEGV (ctx->buffer_b);
+  pos_a += ctx->beg_a;
+  pos_b += ctx->beg_b;
 
   /* Allow the user to escape out of a slow compareseq call.  */
   rarely_quit (++rbc_quitcounter);

src/w32fns.c

@@ -4550,13 +4550,13 @@ w32_wnd_proc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 	  set_ime_composition_window_fn (context, &form);
 	  release_ime_context_fn (hwnd, context);
 	}
-      /* We should "goto dflt" here to pass WM_IME_STARTCOMPOSITION to
-	 DefWindowProc, so that the composition window will actually
-	 be displayed.  But doing so causes trouble with displaying
-	 dialog boxes, such as the file selection dialog or font
-	 selection dialog.  So something else is needed to fix the
-	 former without breaking the latter.  See bug#11732.  */
-      break;
+      /* FIXME: somehow "goto dflt" here instead of "break" causes
+	 popup dialogs, such as the ones shown by File->Open File and
+	 w32-select-font, to become hidden behind their parent frame,
+	 when focus-follows-mouse is in effect.  See bug#11732.  But
+	 if we don't "goto dflt", users of IME cannot type text
+	 supported by the input method...  */
+      goto dflt;
 
     case WM_IME_ENDCOMPOSITION:
       ignore_ime_char = 0;