UTF-8 instead of US-ASCII. [ruby-core:46021] [Feature #6679] * parse.y (parser_initialize): set default parser encoding as UTF-8 instead of US-ASCII. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37485 b2dd03c8-39d4-4d8f-98ff-823fe69b080e