Fix cops_documentation task crashes with Ruby 2.3
Fix cops_documentation task crashes with Ruby 2.3

sue445/rubocop,deivid-rodriguez/rubocop,maxjacobson/rubocop,backus/rubocop,palkan/rubocop,bbatsov/rubocop,lucasuyezu/rubocop,akihiro17/rubocop,b-t-g/rubocop,petehamilton/rubocop,hanumakanthvvn/rubocop,hanumakanthvvn/rubocop,alexdowad/rubocop,bbatsov/rubocop,rrosenblum/rubocop,Drenmi/rubocop,lucasuyezu/rubocop,bquorning/rubocop,ilansh/rubocop,NobodysNightmare/rubocop,alexcstark/rubocop,rtlechow/rubocop,melch/rubocop,haziqhafizuddin/rubocop,bankair/rubocop,jmks/rubocop,bankair/rubocop,deivid-rodriguez/rubocop,meganemura/rubocop,maxjacobson/rubocop,sue445/rubocop,panthomakos/rubocop,palkan/rubocop,jmks/rubocop,smakagon/rubocop,b-t-g/rubocop,jfelchner/rubocop,ilansh/rubocop,iGEL/rubocop,iGEL/rubocop,tdeo/rubocop,jmks/rubocop,backus/rubocop,panthomakos/rubocop,bquorning/rubocop,rrosenblum/rubocop,alexcstark/rubocop,petehamilton/rubocop,sue445/rubocop,NobodysNightmare/rubocop,lumeet/rubocop,panthomakos/rubocop,vergenzt/rubocop,tejasbubane/rubocop,bquorning/rubocop,deivid-rodriguez/rubocop,rtlechow/rubocop,maxjacobson/rubocop,tdeo/rubocop,jfelchner/rubocop,tdeo/rubocop,scottmatthewman/rubocop,vergenzt/rubocop,lumeet/rubocop,sinsoku/rubocop,mikegee/rubocop,mikegee/rubocop,meganemura/rubocop,urbanautomaton/rubocop,smakagon/rubocop,petehamilton/rubocop,haziqhafizuddin/rubocop,mclark/rubocop,mikegee/rubocop,rrosenblum/rubocop,melch/rubocop,pocke/rubocop,palkan/rubocop,scottmatthewman/rubocop,urbanautomaton/rubocop,sinsoku/rubocop,meganemura/rubocop,vergenzt/rubocop,akihiro17/rubocop,alexdowad/rubocop,tejasbubane/rubocop,tejasbubane/rubocop,pocke/rubocop,akihiro17/rubocop,mclark/rubocop,Drenmi/rubocop,jfelchner/rubocop