nobu	2013-03-22 05:34:37 +0900 (Fri, 22 Mar 2013)

  New Revision: 39871

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=39871

  Log:
    * test/ruby/envutil.rb (assert_warning): show diff.

  Modified files:
    trunk/test/ruby/envutil.rb

Index: test/ruby/envutil.rb
===================================================================
--- test/ruby/envutil.rb	(revision 39870)
+++ test/ruby/envutil.rb	(revision 39871)
@@ -299,10 +299,9 @@ eom https://github.com/ruby/ruby/blob/trunk/test/ruby/envutil.rb#L299
         raise res
       end
 
-      def assert_warning(pat, message = nil)
+      def assert_warning(pat, msg = nil)
         stderr = EnvUtil.verbose_warning { yield }
-        message = ' "' + message + '"' if message
-        msg = proc {"warning message #{stderr.inspect} is expected to match #{pat.inspect}#{message}"}
+        msg = message(msg) {diff stderr, pat}
         assert(pat === stderr, msg)
       end
 

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