Add rational kwarg for Mul.as_coeff_mul, like for as_coeff_Mul
add -oo processing to as_coeff_mul
Merge pull request #23 from smichr/ppfix

add -oo processing to as_coeff_mul
add kwargs to other as_coeff_mul routines and process -Number
Merge pull request #25 from smichr/ppfix

Ppfix
Merge pull request #8415 from skirpichev/ppfix2

Add rational kwarg for Mul.as_coeff_mul, like for as_coeff_Mul
Add code quality test for self assignments (fixes #8362)
Code quality: don't assign to self (issue #8362)
Fix remaining self assignments
Fix py3-incompatible code
py3 fix for mailmap_update.py
Code quality: don't assign to cls (classmethod's)