sympy/sympy — pull request #757 by Habel (2011-11-24 18:06:29+00:00)
Title: Removed commented asserts in tests and put xfail tags

http://www.google-melange.com/gci/task/view/google/gci2011/7121284

Basically I went through and made sure that all tests that before had a commented out assert statement are now marked xfail.