Add overlap_slices regression tests
Add overlap_slices regression tests

lpsinger/astropy,bsipocz/astropy,StuartLittlefair/astropy,astropy/astropy,StuartLittlefair/astropy,astropy/astropy,larrybradley/astropy,lpsinger/astropy,larrybradley/astropy,dhomeier/astropy,bsipocz/astropy,mhvk/astropy,aleksandr-bakanov/astropy,saimn/astropy,pllim/astropy,bsipocz/astropy,astropy/astropy,dhomeier/astropy,MSeifert04/astropy,astropy/astropy,mhvk/astropy,StuartLittlefair/astropy,pllim/astropy,MSeifert04/astropy,aleksandr-bakanov/astropy,stargaser/astropy,aleksandr-bakanov/astropy,lpsinger/astropy,saimn/astropy,stargaser/astropy,pllim/astropy,astropy/astropy,dhomeier/astropy,pllim/astropy,saimn/astropy,stargaser/astropy,bsipocz/astropy,pllim/astropy,StuartLittlefair/astropy,mhvk/astropy,dhomeier/astropy,saimn/astropy,lpsinger/astropy,stargaser/astropy,mhvk/astropy,mhvk/astropy,MSeifert04/astropy,saimn/astropy,lpsinger/astropy,larrybradley/astropy,larrybradley/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,larrybradley/astropy,dhomeier/astropy