sympy/sympy — pull request #708 by rlamy (2011-11-11 01:53:35+00:00)
Title: Miscellaneous cleanups

* Avoid using magic hacks to create variables in `sympy/physics/units.py`. This silences umpteen warnings from pyflakes.
* Improve printing performance a little.
* Fix (DirectSum|TensorProduct)HilbertSpace.spaces to return a tuple as advertised in the docstring.
* Remove incorrect uses of 'commutative' in hilbert.py.

@ellisonbg should have a look at the last two.