Add description of PEP8 error E502 [skip ci]
Add description of PEP8 error E502 [skip ci]

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