sympy/sympy — pull request #832 by smichr (2011-12-08 18:58:49+00:00)
Title: Gosper

There were several tests that were commented out which actually pass once the correct answers are checked; there is a test that gosper produces NaN for and I moved that to an XFAIL test.

Some changes were made to is_constant and equals in response to debugging this issue.