Skip doctest that fails in 2.6
Skip doctest that fails in 2.6

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