Fix six import
Fix six import

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