master 4530368c06: Delete many references to Emacs 23 or older from docs

[Stefan Kangas]

branch: master
commit 4530368c06fef6a289b313b35c39e30629104020
Author: Stefan Kangas <stefan@marxist.se>
Commit: Stefan Kangas <stefan@marxist.se>

    Delete many references to Emacs 23 or older from docs
    
    * doc/emacs/glossary.texi (Glossary):
    * doc/emacs/msdos.texi (Windows Fonts):
    * doc/lispref/loading.texi (Library Search):
    * doc/lispref/processes.texi (Accepting Output):
    * doc/misc/auth.texi (GnuPG and EasyPG Assistant Configuration):
    * doc/misc/efaq-w32.texi (Font names):
    * doc/misc/efaq.texi (Turning on syntax highlighting)
    (Escape sequences in shell output):
    * doc/misc/eshell.texi (Bugs and ideas):
    * doc/misc/gnus.texi (nnmairix requirements):
    * doc/misc/gnus-faq.texi (FAQ 1-5):
    * doc/misc/idlwave.texi (Troubleshooting):
    * doc/misc/message.texi (Using S/MIME):
    * doc/misc/mh-e.texi (Preface, Incorporating Mail):
    * doc/misc/viper.texi (Viper Specials): Delete references to Emacs 23
    or older.
---
 doc/emacs/glossary.texi    |  4 ++--
 doc/emacs/msdos.texi       |  6 +++---
 doc/lispref/loading.texi   |  2 +-
 doc/lispref/processes.texi |  1 -
 doc/misc/auth.texi         | 10 ++--------
 doc/misc/efaq-w32.texi     |  6 +++---
 doc/misc/efaq.texi         | 28 ++++++++++++----------------
 doc/misc/eshell.texi       |  5 -----
 doc/misc/gnus-faq.texi     | 12 ------------
 doc/misc/gnus.texi         |  2 +-
 doc/misc/idlwave.texi      | 11 -----------
 doc/misc/message.texi      | 11 +++++------
 doc/misc/mh-e.texi         |  6 +++---
 doc/misc/viper.texi        |  2 +-
 14 files changed, 33 insertions(+), 73 deletions(-)

diff --git a/doc/emacs/glossary.texi b/doc/emacs/glossary.texi
index 5224e31340..9a53701997 100644
--- a/doc/emacs/glossary.texi
+++ b/doc/emacs/glossary.texi
@@ -1457,8 +1457,8 @@ level by aborting (q.v.@:) and quitting (q.v.).  
@xref{Quitting}.
 @item Transient Mark Mode
 The default behavior of the mark (q.v.@:) and region (q.v.), in which
 setting the mark activates it and highlights the region, is called
-Transient Mark mode.  In GNU Emacs 23 and onwards, it is enabled by
-default.  @xref{Disabled Transient Mark}.
+Transient Mark mode.  It is enabled by default.  @xref{Disabled
+Transient Mark}.
 
 @item Transposition
 Transposing two units of text means putting each one into the place
diff --git a/doc/emacs/msdos.texi b/doc/emacs/msdos.texi
index e30d623a77..dd0787cd38 100644
--- a/doc/emacs/msdos.texi
+++ b/doc/emacs/msdos.texi
@@ -986,9 +986,9 @@ printer, put this in your @file{.emacs} file:
 @section Specifying Fonts on MS-Windows
 @cindex font specification (MS Windows)
 
-  Starting with Emacs 23, fonts are specified by their name, size
-and optional properties.  The format for specifying fonts comes from the
-fontconfig library used in modern Free desktops:
+  Fonts are specified by their name, size and optional properties.
+The format for specifying fonts comes from the fontconfig library used
+in modern Free desktops:
 
 @example
   [Family[-PointSize]][:Option1=Value1[:Option2=Value2[...]]]
diff --git a/doc/lispref/loading.texi b/doc/lispref/loading.texi
index 0972a7a123..4e4f12dc32 100644
--- a/doc/lispref/loading.texi
+++ b/doc/lispref/loading.texi
@@ -440,7 +440,7 @@ similarly-named file in a directory earlier on 
@code{load-path}.
 For instance, suppose @code{load-path} is set to
 
 @example
-  ("/opt/emacs/site-lisp" "/usr/share/emacs/23.3/lisp")
+  ("/opt/emacs/site-lisp" "/usr/share/emacs/29.1/lisp")
 @end example
 
 @noindent
diff --git a/doc/lispref/processes.texi b/doc/lispref/processes.texi
index 382053ab24..db6b4c35ef 100644
--- a/doc/lispref/processes.texi
+++ b/doc/lispref/processes.texi
@@ -1960,7 +1960,6 @@ because @var{seconds} can be floating point to specify
 waiting a fractional number of seconds.  If @var{seconds} is 0, the
 function accepts whatever output is pending but does not wait.
 
-@c Emacs 22.1 feature
 If @var{process} is a process, and the argument @var{just-this-one} is
 non-@code{nil}, only output from that process is handled, suspending output
 from other processes until some output has been received from that
diff --git a/doc/misc/auth.texi b/doc/misc/auth.texi
index 829d7f4fa0..91a9afd9c9 100644
--- a/doc/misc/auth.texi
+++ b/doc/misc/auth.texi
@@ -652,14 +652,8 @@ before @file{~/.authinfo}, the auth-source library will 
try to
 read the GnuPG encrypted @file{.gpg} file first, before
 the unencrypted file.
 
-In Emacs 23 or later there is an option @code{auto-encryption-mode} to
-automatically decrypt @file{*.gpg} files.  It is enabled by default.
-If you are using earlier versions of Emacs, you will need:
-
-@lisp
-(require 'epa-file)
-(epa-file-enable)
-@end lisp
+There is an option @code{auto-encryption-mode} to automatically
+decrypt @file{*.gpg} files.  It is enabled by default.
 
 If you want your GnuPG passwords to be cached, set up @code{gpg-agent}
 or EasyPG Assistant
diff --git a/doc/misc/efaq-w32.texi b/doc/misc/efaq-w32.texi
index 084b5a3254..46c257e42e 100644
--- a/doc/misc/efaq-w32.texi
+++ b/doc/misc/efaq-w32.texi
@@ -930,9 +930,9 @@ an indication of whether the font is outline (.TTF, .ATM) 
or raster (.FON)
 based when fonts are listed, which may let you differentiate between two
 fonts with the same name and different technologies.
 
-Starting with Emacs 23, the preferred font name format will be moving
-to the simpler and more flexible fontconfig format.  XLFD names will
-continue to be supported for backward compatibility.
+Starting with Emacs 23, the preferred font name format is the simpler
+and more flexible fontconfig format.  XLFD names will continue to be
+supported for backward compatibility.
 
 @example
 XLFD: -*-Courier New-normal-r-*-*-13-*-*-*-c-*-iso8859-1
diff --git a/doc/misc/efaq.texi b/doc/misc/efaq.texi
index a98c4b6a61..c29e4fe487 100644
--- a/doc/misc/efaq.texi
+++ b/doc/misc/efaq.texi
@@ -2891,20 +2891,20 @@ and cause an annoying delay in display, so several 
features exist to
 work around this.
 
 @cindex Just-In-Time syntax highlighting
-In Emacs 21 and later, turning on @code{font-lock-mode} automatically
-activates the new @dfn{Just-In-Time fontification} provided by
-@code{jit-lock-mode}.  @code{jit-lock-mode} defers the fontification of
-portions of buffer until you actually need to see them, and can also
-fontify while Emacs is idle.  This makes display of the visible portion
-of a buffer almost instantaneous.  For details about customizing
-@code{jit-lock-mode}, type @kbd{C-h f jit-lock-mode @key{RET}}.
+Turning on @code{font-lock-mode} automatically activates
+@dfn{Just-In-Time fontification} provided by @code{jit-lock-mode}.
+@code{jit-lock-mode} defers the fontification of portions of buffer
+until you actually need to see them, and can also fontify while Emacs
+is idle.  This makes display of the visible portion of a buffer almost
+instantaneous.  For details about customizing @code{jit-lock-mode},
+type @kbd{C-h f jit-lock-mode @key{RET}}.
 
 @cindex Levels of syntax highlighting
 @cindex Decoration level, in @code{font-lock-mode}
-In versions of Emacs before 21, different levels of decoration are
-available, from slight to gaudy.  More decoration means you need to wait
-more time for a buffer to be fontified (or a faster machine).  To
-control how decorated your buffers should become, set the value of
+Different levels of decoration are available, from slight to gaudy.
+More decoration means you need to wait more time for a buffer to be
+fontified (or a faster machine).  To control how decorated your
+buffers should become, set the value of
 @code{font-lock-maximum-decoration} in your @file{.emacs} file, with a
 @code{nil} value indicating default (usually minimum) decoration, and a
 @code{t} value indicating the maximum decoration.  For the gaudiest
@@ -2985,11 +2985,7 @@ Add the following line to your @file{.emacs} file:
 In many systems, @code{ls} is aliased to @samp{ls --color}, which
 prints using ANSI color escape sequences.  Emacs includes the
 @code{ansi-color} package, which lets Shell mode recognize these
-escape sequences.  In Emacs 23.2 and later, the package is enabled by
-default; in earlier versions you can enable it by typing @kbd{M-x
-ansi-color-for-comint-mode} in the Shell buffer, or by adding
-@code{(add-hook 'shell-mode-hook 'ansi-color-for-comint-mode-on)} to
-your init file.
+escape sequences.  It is enabled by default.
 
 @node Fullscreen mode on MS-Windows
 @section How can I start Emacs in fullscreen mode on MS-Windows?
diff --git a/doc/misc/eshell.texi b/doc/misc/eshell.texi
index aae779575d..13f13163dd 100644
--- a/doc/misc/eshell.texi
+++ b/doc/misc/eshell.texi
@@ -1848,11 +1848,6 @@ scrolls back.
 
 @item Menu support was removed, but never put back
 
-@item Using C-p and C-n with rebind gets into a locked state
-
-This happened a few times in Emacs 21, but has been irreproducible
-since.
-
 @item If an interactive process is currently running, @kbd{M-!} doesn't work
 
 @item Use a timer instead of @code{sleep-for} when killing child processes
diff --git a/doc/misc/gnus-faq.texi b/doc/misc/gnus-faq.texi
index 4923efb3db..ee179ba0d0 100644
--- a/doc/misc/gnus-faq.texi
+++ b/doc/misc/gnus-faq.texi
@@ -102,7 +102,6 @@ misprints are the Gnus team's fault, sorry.
 * FAQ 1-3::    Where and how to get Gnus?
 * FAQ 1-4::    I sometimes read references to No Gnus and Oort Gnus,
                what are those?
-* FAQ 1-5::    Which version of Emacs do I need?
 @end menu
 
 @node FAQ 1-1
@@ -176,17 +175,6 @@ once become Gnus 5.12 or Gnus 6. (If you're wondering why
 not 5.11, the odd version numbers are normally used for
 the Gnus versions bundled with Emacs)
 
-@node FAQ 1-5
-@subsubheading Question 1.5
-
-Which version of Emacs do I need?
-
-@subsubheading Answer
-
-Gnus 5.13 requires an Emacs version that is greater than or equal
-to Emacs 23.1, although there are some features that
-only work on Emacs 24.
-
 @node FAQ 2 - Startup / Group buffer
 @subsection Startup / Group buffer
 
diff --git a/doc/misc/gnus.texi b/doc/misc/gnus.texi
index 8b065829fb..baffe369c3 100644
--- a/doc/misc/gnus.texi
+++ b/doc/misc/gnus.texi
@@ -21958,7 +21958,7 @@ you can set up a local @acronym{IMAP} server, which you 
then access via
 @code{nnimap}.  This is a rather massive setup for accessing some mbox
 files, so just change to MH or Maildir already...  However, if you're
 really, really passionate about using mbox, you might want to look into
-the package @file{mairix.el}, which comes with Emacs 23.
+the package @file{mairix.el}, which comes with Emacs.
 
 @node What nnmairix does
 @subsection What nnmairix does
diff --git a/doc/misc/idlwave.texi b/doc/misc/idlwave.texi
index 6aaa4309a1..0ba87b2e58 100644
--- a/doc/misc/idlwave.texi
+++ b/doc/misc/idlwave.texi
@@ -4116,17 +4116,6 @@ configuration files (e.g., @file{.cshrc}), but from the 
file
 @file{~/.MacOSX/environment.plist}.  Either include your path settings
 there, or start Emacs and IDLWAVE from the shell.
 
-@item @strong{I'm getting errors like @samp{Symbol's value as variable is void:
-cl-builtin-gethash} on completion or routine info.}
-
-This error arises if you upgraded Emacs from 20.x to 21.x without
-re-installing IDLWAVE@.  Old Emacs and new Emacs are not byte-compatible
-in compiled lisp files.  Presumably, you kept the original .elc files in
-place, and this is the source of the error.  If you recompile (or just
-"make; make install") from source, it should resolve this problem.
-Another option is to recompile the @file{idlw*.el} files by hand using
-@kbd{M-x byte-compile-file}.
-
 @item @strong{@kbd{M-@key{TAB}} doesn't complete words, it switches
 windows on my desktop.}
 
diff --git a/doc/misc/message.texi b/doc/misc/message.texi
index 29fbdfe178..49e3faed7b 100644
--- a/doc/misc/message.texi
+++ b/doc/misc/message.texi
@@ -1152,12 +1152,11 @@ programs are required to make things work, and some 
small general hints.
 @uref{https://www.gnupg.org/, GNU Privacy Guard} or
 @uref{https://www.openssl.org/, OpenSSL}.  The default Emacs interface
 to the S/MIME implementation is EasyPG (@pxref{Top,,EasyPG Assistant
-User's Manual, epa, EasyPG Assistant User's Manual}), which has been
-included in Emacs since version 23 and which relies on the command
-line tool @command{gpgsm} provided by @acronym{GnuPG}.  That tool
-implements certificate management, including certificate revocation
-and expiry, while such tasks need to be performed manually, if OpenSSL
-is used.
+User's Manual, epa, EasyPG Assistant User's Manual}), which is
+included in Emacs and relies on the command line tool @command{gpgsm}
+provided by @acronym{GnuPG}.  That tool implements certificate
+management, including certificate revocation and expiry, while such
+tasks need to be performed manually, if OpenSSL is used.
 
 The choice between EasyPG and OpenSSL is controlled by the variable
 @code{mml-smime-use}, which needs to be set to the value @code{epg}
diff --git a/doc/misc/mh-e.texi b/doc/misc/mh-e.texi
index 12841860d9..83d81fc12d 100644
--- a/doc/misc/mh-e.texi
+++ b/doc/misc/mh-e.texi
@@ -213,8 +213,8 @@ more niceties about GNU Emacs and MH@. Now I'm fully hooked 
on both of
 them.
 
 The MH-E package is distributed with Emacs@footnote{Version
-@value{VERSION} of MH-E appeared in Emacs 24.4. It is supported in GNU
-Emacs 23 and higher. It is compatible with MH versions 6.8.4 and
+@value{VERSION} of MH-E appeared in Emacs 24.4.
+It is compatible with MH versions 6.8.4 and
 higher, all versions of nmh, and GNU mailutils 1.0 and higher}, so you
 shouldn't have to do anything special to use it. Gnus is also
 required; version 5.10 or higher is recommended. This manual covers
@@ -1488,7 +1488,7 @@ Binding} of @samp{m}.
 @cindex Unix commands, @command{xbuffy}
 
 You can use @command{xbuffy} to automate the incorporation of this
-mail using the Emacs 23 command @command{emacsclient} as follows:
+mail using the Emacs command @command{emacsclient} as follows:
 
 @smallexample
 box ~/mail/mh-e
diff --git a/doc/misc/viper.texi b/doc/misc/viper.texi
index 0e2473ddf3..0703667ecc 100644
--- a/doc/misc/viper.texi
+++ b/doc/misc/viper.texi
@@ -2571,7 +2571,7 @@ The GNU Emacs Manual}, for more information on tags.
 
 The following two commands are normally bound to a mouse click and are part
 of Viper.  They work only if Emacs runs as an application under X
-Windows (or under some other window system for which a port of GNU Emacs 20
+Windows (or under some other window system for which a port of GNU Emacs
 is available).  Clicking the mouse when Emacs is invoked in an Xterm window
 (using @code{emacs -nw}) will do no good.