Fix error message
Fix error message

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