revert re.c in r53736
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53738 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
revert re.c in r53736
it is not a static literal.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53738 b2dd03c8-39d4-4d8f-98ff-823fe69b080e