Fix wording of rmail's section in NEWS.

etc/ChangeLog

+2010-12-24  Kenichi Handa  <handa@m17n.org>
+
+	* NEWS: Describe the changes for rmail's MIME handling.
+
 2010-12-04  W. Martin Borgert <debacle@debian.org>  (tiny change)
 
 	* schema/schemas.xml: Add DocBook (Bug#7491).

etc/NEWS

@@ -74,23 +74,23 @@ Any unknown header is left as is in the message, so it is not lost.
 
 ** Rmail
 
-** The default value of `rmail-enable-mime' is now t.  Rmail decodes
+*** The default value of `rmail-enable-mime' is now t.  Rmail decodes
 MIME contents automatically.  You can customize the variable
 `rmail-enable-mime' back to `nil' to disable this automatic MIME
 decoding.
 
-** The command `rmail-mime' change the displaying of a MIME message
+*** The command `rmail-mime' change the displaying of a MIME message
 between decoded presentation form and raw data if `rmail-enable-mime'
 is non-nil.  And, with prefix argument, it change only the displaying
 of the MIME entity at point.
 
-** The new command TAB (rmail-mime-next-item) moves point to the next
-item of MIME message.
+*** The new command `rmail-mime-next-item' (bound to TAB) moves point
+to the next item of MIME message.
 
-** The new command backtab (rmail-mime-previous-item) moves point to
-the previous item of MIME message.
+*** The new command `rmail-mime-previous-item' (bound to backtab) moves
+point to the previous item of MIME message.
 
-** The new command RET (rmail-mime-toggle-hidden) hide or show the
+*** The new command `rmail-mime-toggle-hidden' (RET) hide or show the
 body of the MIME entity at point.
 
 ** Obsolete packages