sympy/sympy — pull request #2353 by skirpichev (2013-08-05 15:51:31+00:00)
Title: UnXFAIL several Wester tests with nsimplify and UnFAIL test_M2

N.B.: I'm not sure if we can use nsimplify() in test_wester.py (except for D chapter, of course). But it seems to be a current practice. So...