add ML ref.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14077 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

bootstraptest/test_knownbug.rb

@@ -13,4 +13,4 @@ assert_equal '0', %q{
 assert_match /unterminated string meets end of file/, %q{
   STDERR.reopen(STDOUT)
   eval("\"\xfd".force_encoding("utf-8"))
-}
+}, '[ruby-dev:32429]'