I added the following additional commits from 3.0.3.pre1: * https://github.com/ruby/psych/pull/356 * https://github.com/ruby/psych/pull/357 * https://github.com/ruby/psych/pull/359 git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63280 b2dd03c8-39d4-4d8f-98ff-823fe69b080e