Fixed a check of non-equality between frames in a test
Fixed a check of non-equality between frames in a test

mhvk/astropy,pllim/astropy,larrybradley/astropy,saimn/astropy,lpsinger/astropy,saimn/astropy,astropy/astropy,lpsinger/astropy,astropy/astropy,aleksandr-bakanov/astropy,aleksandr-bakanov/astropy,lpsinger/astropy,mhvk/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,larrybradley/astropy,saimn/astropy,pllim/astropy,mhvk/astropy,mhvk/astropy,aleksandr-bakanov/astropy,saimn/astropy,dhomeier/astropy,astropy/astropy,pllim/astropy,astropy/astropy,saimn/astropy,StuartLittlefair/astropy,dhomeier/astropy,StuartLittlefair/astropy,pllim/astropy,astropy/astropy,dhomeier/astropy,larrybradley/astropy,lpsinger/astropy,pllim/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,mhvk/astropy,larrybradley/astropy,lpsinger/astropy,StuartLittlefair/astropy,dhomeier/astropy