Changing __nonzero__ to __bool__
Changing __nonzero__ to __bool__

StuartLittlefair/astropy,larrybradley/astropy,funbaker/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,DougBurke/astropy,bsipocz/astropy,funbaker/astropy,larrybradley/astropy,pllim/astropy,saimn/astropy,dhomeier/astropy,pllim/astropy,dhomeier/astropy,larrybradley/astropy,lpsinger/astropy,dhomeier/astropy,astropy/astropy,mhvk/astropy,StuartLittlefair/astropy,dhomeier/astropy,astropy/astropy,pllim/astropy,dhomeier/astropy,astropy/astropy,saimn/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,larrybradley/astropy,mhvk/astropy,bsipocz/astropy,saimn/astropy,mhvk/astropy,MSeifert04/astropy,bsipocz/astropy,lpsinger/astropy,pllim/astropy,MSeifert04/astropy,DougBurke/astropy,MSeifert04/astropy,mhvk/astropy,astropy/astropy,stargaser/astropy,aleksandr-bakanov/astropy,funbaker/astropy,stargaser/astropy,saimn/astropy,stargaser/astropy,mhvk/astropy,stargaser/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,DougBurke/astropy,pllim/astropy,astropy/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,MSeifert04/astropy,saimn/astropy,DougBurke/astropy,funbaker/astropy,lpsinger/astropy,lpsinger/astropy