scoped constant op-assignment
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38585 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
scoped constant op-assignment
parse.y (stmt, arg): allow scoped constant op-assignment.
[ruby-core:40154] [Bug #5449]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38585 b2dd03c8-39d4-4d8f-98ff-823fe69b080e