Fix bug with object cloning that occurs when Marshal.dump for some object produces the "I" character in serialized data.
Most likely, Ruby reverted this behavior by 1.9.3, because now it behaves as the spec says it did before 1.9.
Be able to run only a portion of the specs.
Should be more generic for 'specs'
Merge pull request #1 from gettaxi/fix_marshaling_bug

Fix marshaling bug for a corner case