Fix first example in docs
Fix first example in docs

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