From: Marc Butler <marc.butler@...>
Date: 2001-04-30T11:14:07+09:00
Subject: [ruby-talk:14422] Problem colouring regexps in Emacs 20.7

I also encountered the problem where an escaped forward slash in a 
regular expression such as /\// cause a large portion of the script
to be coloured like a string/regexp in GNU Emacs 20.7. [Ruby-talk 6002]

  I believe this patch fixes the problem.  If other users could confirm
this, it can be applied to misc/ruby-mode.el in the distribution.
Thanks, Marc.
(The patch starts on the line beginning with --- and was is unified
diff format.)
--- ../ruby-1.6.3/misc/ruby-mode.el	Thu Feb  8 09:18:02 2001
+++ ruby-mode.el	Sun Apr 29 17:54:35 2001
@@ -670,7 +670,7 @@
 	       (setq font-lock-syntactic-keywords
 		     '(("\\$\\([#\"'`$\\]\\)" 1 (1 . nil))
 		       ("\\(#\\)[{$@]" 1 (1 . nil))
-		       ("\\(/\\)\\([^/\n]\\|\\\\/\\)*\\(/\\)"
+		       ("\\(/\\)\\([^/\n]\\|\\/\\)*\\(/\\)"
 			(1 (7 . ?'))
 			(3 (7 . ?')))))
 	       (make-local-variable 'font-lock-defaults)