Fix for sphinx warnings
Fix for sphinx warnings

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