Update SkyCoord docstring
Update SkyCoord docstring

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