Add Returns clause to docstring
Add Returns clause to docstring

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