field.  it is used by node_newnode.
  new field parser_ruby_sourcefile_string for ripper.
  (parser_initialize): initialize parser_ruby_sourcefile in ripper.
  (ripper_initialize): initialize parser_ruby_sourcefile_string.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14698 b2dd03c8-39d4-4d8f-98ff-823fe69b080e