Ruby

• parse.y (parser_parse_string): set the mark of term to nd_func
  because in this version u2.id is not used for this purpose.
  fixed failure of ruby/spec introduced at r58518.
  see also [Backport #13363]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@58522 b2dd03c8-39d4-4d8f-98ff-823fe69b080e