Minor doc fixes
Minor doc fixes

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