add test for looser convolve rules
add test for looser convolve rules

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