Fix typo in decorator per https://github.com/astropy/astropy/pull/2835/files#r16432656
Fix typo in decorator per https://github.com/astropy/astropy/pull/2835/files#r16432656

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