Fix whitespace PEP8 problem [skip ci]
Fix whitespace PEP8 problem [skip ci]

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