parse.y: refine assign_in_cond warning
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62620 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
parse.y: refine assign_in_cond warning
assignment of a literal in conditinal expression.
[ruby-core:85872] [Bug #14562]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62620 b2dd03c8-39d4-4d8f-98ff-823fe69b080e