* misc/ruby-mode.el: don't crash the whole mode if the Subversion

$ keyword isn't interpolated.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19203 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -5,6 +5,9 @@ Sun Sep  7 07:24:09 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* misc/ruby-mode.el: improve here-doc performance.
 
+	* misc/ruby-mode.el: don't crash the whole mode if the Subversion
+	  $ keyword isn't interpolated.
+
 Sun Sep  7 06:31:51 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* file.c (file_expand_path): applied a patch from Nobuhiro Tachino

misc/ruby-mode.el

@@ -9,9 +9,8 @@
   "Ruby mode revision string.")
 
 (defconst ruby-mode-version
-  (progn
-   (string-match "[0-9.]+" ruby-mode-revision)
-   (substring ruby-mode-revision (match-beginning 0) (match-end 0)))
+  (and (string-match "[0-9.]+" ruby-mode-revision)
+       (substring ruby-mode-revision (match-beginning 0) (match-end 0)))
   "Ruby mode version number.")
 
 (defconst ruby-block-beg-re