go back to regular mpl b/c sphinx build not in 3.x
go back to regular mpl b/c sphinx build not in 3.x

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