Stdlib: nre: Convenience proc ``contains`` added.
Stdlib: nre: Convenience proc ``contains`` added.

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