Added `format` examples to coordinates docs
Added `format` examples to coordinates docs

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