Fix mistake in setting global FORMAT_CLASSES
Fix mistake in setting global FORMAT_CLASSES

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