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