quotes should not have changed. [ruby-core:59316] [Bug #9300] * ext/psych/lib/psych.rb: fixed missing require. * test/psych/test_string.rb: test git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44531 b2dd03c8-39d4-4d8f-98ff-823fe69b080e