Fix biweight_midvariance example
Fix biweight_midvariance example

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