commands. [ruby-dev:45563][Bug #6347] * parse.y (superclass): ditto for superclass. * parse.y (parser_parse_string, parser_here_document): ditto for string interpolation. * parse.y (parser_yylex): ditto for singleton class. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35457 b2dd03c8-39d4-4d8f-98ff-823fe69b080e