asmeurer/sympy — pull request #45 by smichr (2012-07-27 23:37:16+00:00)
Title: coverage for commutator test (for Mul)

Comm(A*B, C) doesn't test the expansion of the first arg being a Mul
since this is rewritten as -Comm(C, A*B) so the test was modified.
(Mul-first was covered incidentally by the test in commutator_dagger,
but now it is tested more explicitly.)