(auto-mode-alist): Use rst-mode for *.rst and *.rest files.

lisp/ChangeLog

@@ -14,6 +14,7 @@
 	Remove unused var `in-par'.  Use `point' rather than `point-marker'.
 	(rst-line-block-region): Reduce redundancy.  Use the `pfxarg' arg.
 	(rst-replace-lines): Simplify.
+	(auto-mode-alist): Use rst-mode for *.rst and *.rest files.
 
 	* simple.el (special-mode-map): New var.
 	(special-mode): New major mode.

lisp/textmodes/rst.el

@@ -361,7 +361,9 @@ The value of this variable is used when Rst Mode is turned on."
   :group 'rst
   :type '(boolean))
 
-
+;; Use rst-mode for *.rst and *.rest files.  Many ReStructured-Text files
+;; use *.txt, but this is too generic to be set as a default.
+;;;###autoload (add-to-list 'auto-mode-alist '("\\.re?st\\'" . rst-mode))
 ;;;###autoload
 (define-derived-mode rst-mode text-mode "ReST"
   :abbrev-table rst-mode-abbrev-table