sympy/sympy — pull request #8399 by skirpichev (2014-11-07 01:21:23+00:00)
Title: Add rational kwarg for Mul.as_coeff_mul, like for as_coeff_Mul

this fix the printing problem, mentioned [here](https://github.com/sympy/sympy/issues/8398#issuecomment-62069573). The problem was introduced in #8305.