Fix unit bug in biweight_midvariance
Fix unit bug in biweight_midvariance

mhvk/astropy,astropy/astropy,lpsinger/astropy,mhvk/astropy,mhvk/astropy,mhvk/astropy,larrybradley/astropy,StuartLittlefair/astropy,saimn/astropy,saimn/astropy,lpsinger/astropy,pllim/astropy,saimn/astropy,pllim/astropy,astropy/astropy,astropy/astropy,StuartLittlefair/astropy,pllim/astropy,StuartLittlefair/astropy,larrybradley/astropy,pllim/astropy,saimn/astropy,pllim/astropy,lpsinger/astropy,saimn/astropy,lpsinger/astropy,astropy/astropy,StuartLittlefair/astropy,larrybradley/astropy,astropy/astropy,mhvk/astropy,StuartLittlefair/astropy,larrybradley/astropy,larrybradley/astropy,lpsinger/astropy