documentation fix [docs only]
documentation fix [docs only]

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