* ext/psych/lib/psych/visitors/yaml_tree.rb: string subclasses should
  not be considered to be binary.  Fixes Psych / GH 166
  https://github.com/tenderlove/psych/issues/166

* test/psych/test_string.rb: test for fix

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43469 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-10-30

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43470 b2dd03c8-39d4-4d8f-98ff-823fe69b080e