Gnus: Exclude iso-2022-jp-2 and shift_jis from the default value set to...

Gnus: Exclude iso-2022-jp-2 and shift_jis from the default value set to mm-coding-system-priorities for Japanese users

doc/misc/ChangeLog

+2013-08-19  Katsumi Yamaoka  <yamaoka@jpl.org>
+
+	* emacs-mime.texi (Encoding Customization): Exclude iso-2022-jp-2 and
+	shift_jis from the default value set to mm-coding-system-priorities for
+	Japanese users.
+
 2013-08-13  Glenn Morris  <rgm@gnu.org>
 
 	* reftex.texi (LaTeX xr Package, Options - Table of Contents)

doc/misc/emacs-mime.texi

@@ -871,15 +871,15 @@ by using the @code{encoding} @acronym{MML} tag (@pxref{MML Definition}).
 @vindex mm-coding-system-priorities
 Prioritize coding systems to use for outgoing messages.  The default
 is @code{nil}, which means to use the defaults in Emacs, but is
-@code{(iso-8859-1 iso-2022-jp iso-2022-jp-2 shift_jis utf-8)} when
-running Emacs in the Japanese language environment.  It is a list of
-coding system symbols (aliases of coding systems are also allowed, use
-@kbd{M-x describe-coding-system} to make sure you are specifying correct
-coding system names).  For example, if you have configured Emacs
-to prefer UTF-8, but wish that outgoing messages should be sent in
-ISO-8859-1 if possible, you can set this variable to
-@code{(iso-8859-1)}.  You can override this setting on a per-message
-basis by using the @code{charset} @acronym{MML} tag (@pxref{MML Definition}).
+@code{(iso-8859-1 iso-2022-jp utf-8)} when running Emacs in the Japanese
+language environment.  It is a list of coding system symbols (aliases of
+coding systems are also allowed, use @kbd{M-x describe-coding-system} to
+make sure you are specifying correct coding system names).  For example,
+if you have configured Emacs to prefer UTF-8, but wish that outgoing
+messages should be sent in ISO-8859-1 if possible, you can set this
+variable to @code{(iso-8859-1)}.  You can override this setting on a
+per-message basis by using the @code{charset} @acronym{MML} tag
+(@pxref{MML Definition}).
 
 As different hierarchies prefer different charsets, you may want to set
 @code{mm-coding-system-priorities} according to the hierarchy in Gnus.
@@ -904,7 +904,7 @@ Here's an example:
           (mm-coding-system-priorities '(iso-8859-15 iso-8859-1 utf-8)))
          ("^fj\\." ;; Japanese
           (mm-coding-system-priorities
-           '(iso-8859-1 iso-2022-jp iso-2022-jp-2 shift_jis utf-8)))
+           '(iso-8859-1 iso-2022-jp utf-8)))
          ("^ru\\." ;; Cyrillic
           (mm-coding-system-priorities
            '(koi8-r iso-8859-5 iso-8859-1 utf-8))))

lisp/gnus/ChangeLog

+2013-08-19  Katsumi Yamaoka  <yamaoka@jpl.org>
+
+	* mm-util.el (mm-coding-system-priorities): Exclude iso-2022-jp-2 and
+	shift_jis from the default value set for Japanese users.
+
 2013-08-13  Glenn Morris  <rgm@gnu.org>
 	* gnus-icalendar.el (gnus-icalendar-org-capture-file): Fix type.

lisp/gnus/mm-util.el

@@ -845,17 +845,17 @@ Valid elements include:
 	   (not lang) nil)
 	  ;; In XEmacs 21.5 it may be the one like "Japanese (UTF-8)".
 	  ((string-match "\\`Japanese" lang)
-	   ;; Japanese users prefer iso-2022-jp to euc-japan or
-	   ;; shift_jis, however iso-8859-1 should be used when
-	   ;; there are only ASCII text and Latin-1 characters.
-	   '(iso-8859-1 iso-2022-jp iso-2022-jp-2 shift_jis utf-8))))
+	   ;; Japanese users prefer iso-2022-jp to others usually used
+	   ;; for `buffer-file-coding-system', however iso-8859-1 should
+	   ;; be used when there are only ASCII and Latin-1 characters.
+	   '(iso-8859-1 iso-2022-jp utf-8))))
   "Preferred coding systems for encoding outgoing messages.
 
 More than one suitable coding system may be found for some text.
 By default, the coding system with the highest priority is used
 to encode outgoing messages (see `sort-coding-systems').  If this
 variable is set, it overrides the default priority."
-  :version "21.2"
+  :version "24.4"
   :type '(repeat (symbol :tag "Coding system"))
   :group 'mime)