Fix docstring
Fix docstring

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