docstring clarifications
docstring clarifications

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