* lib/yaml.rb: YAML documentation from #8344 [Bug #8355]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@40837 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-05-20

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@40838 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* ChangeLog: update patchlevel

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@40843 b2dd03c8-39d4-4d8f-98ff-823fe69b080e