Fix doc typos and leftover print statement noted by @mhvk [skip ci]
Fix doc typos and leftover print statement noted by @mhvk [skip ci]

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