reviving objects. Fixes GH psych #168 * test/psych/test_merge_keys.rb: test for change https://github.com/tenderlove/psych/issues/168 git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43541 b2dd03c8-39d4-4d8f-98ff-823fe69b080e