Rename "_combine" to "_arithmetic"
Rename "_combine" to "_arithmetic"

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