* test/ripper/test_parser_events.rb (test_qwords_add),
  (test_qsymbols_add, test_symbols_add, test_words_add): more
  assertions for results of list literals.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60891 b2dd03c8-39d4-4d8f-98ff-823fe69b080e