fixes #4656; ropes.nim checks properly for file equality
fixes #4656; ropes.nim checks properly for file equality

russpowers/Nim,russpowers/Nim,singularperturbation/Nim,dom96/Nim,mbaulch/Nim,jfhg/Nim,russpowers/Nim,tulayang/Nim,dom96/Nim,dom96/Nim,jfhg/Nim,haiodo/Nim,tulayang/Nim,haiodo/Nim,dom96/Nim,russpowers/Nim,jfhg/Nim,singularperturbation/Nim,russpowers/Nim,russpowers/Nim,jfhg/Nim,haiodo/Nim,mbaulch/Nim,haiodo/Nim,russpowers/Nim,jfhg/Nim,singularperturbation/Nim,mbaulch/Nim,singularperturbation/Nim,dom96/Nim,mbaulch/Nim,dom96/Nim,haiodo/Nim,dom96/Nim,singularperturbation/Nim,haiodo/Nim,mbaulch/Nim,jfhg/Nim,haiodo/Nim,tulayang/Nim,singularperturbation/Nim,tulayang/Nim,tulayang/Nim,tulayang/Nim,singularperturbation/Nim,mbaulch/Nim,mbaulch/Nim,jfhg/Nim