Add one more test of attribute inheritance
Add one more test of attribute inheritance

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