Fix warning statements
Fix warning statements

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