Fixing one stats warning [docs only]
Fixing one stats warning [docs only]

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