Comment #17 on issue 1261 by wflynny: incorrect exponentiation with  
non-commutative symbols
http://code.google.com/p/sympy/issues/detail?id=1261

I hadn't even made a patch but here is one that implements the fix.  
Hopefully I
remember how to make patches correctly.

It was just an impulse fix - I just ran the tests and 1 fails in the  
odesolvers,
Bernoulli I think. Anyway, here you go.

Attachments:
        0001-quick-fix-in-mul.py-_eval_power-to-fix-powers-of-non.patch  883 
bytes

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