parse.y: optional superclass
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51529 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
parse.y: optional superclass
any contents without a terminator. [EXPERIMENTAL]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51529 b2dd03c8-39d4-4d8f-98ff-823fe69b080e