PEP8 fixes on nes_types.py
PEP8 fixes on nes_types.py

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