last commit:
COMMIT Add specs for mock_to_path	http://github.com/rubyspec/mspec/commit/a719211ff32b725b9e9568cf887868849e73d796
last commit:
COMMIT RUBY_REVISION depends on svc, just RubyVM uses a svc that uses numbers for revisions	http://github.com/rubyspec/rubyspec/commit/eb4732c7b3a652e4d44fb8a0c0d58a386767fb0c