changed documentation wording
changed documentation wording

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