PEP8 fixes on tests/composer_example_mario_test.py
PEP8 fixes on tests/composer_example_mario_test.py

edwardpark/pyNES,stellatigre/pyNES,GrimDerp/pyNES,bigpete/pyNES,ftick/pyNES,danielserva/pyNES,silky/pyNES,bradparks/pyNES__python_8bit_nes_games_nintendo,NickDeckerDevs/pyNES,DaTrollMon/pyNES,shaunstanislaus/pyNES,gutomaia/pyNES,arabenjamin/pyNES,kubov/pyNES,jay-johnson/pyNES,JohnKossa/pyNES,kod3r/pyNES,tekromancr/pyNES,BmanisKing/Mine,sperez4mba/pyNES,Militree/pyNES,fufufanatic/pyNES,Gybes/pyNES,MSylvia/pyNES,jmgaya/pyNES,imanmafi/pyNES,AsSheng/pyNES,shekkbuilder/pyNES