Add more comments to NodePattern
Add more comments to NodePattern

The code is easy enough for its author to read, but that's not saying much.
Other people should also be able to jump in and hack on it!

legendetm/rubocop,tdeo/rubocop,lumeet/rubocop,akihiro17/rubocop,lucasuyezu/rubocop,bquorning/rubocop,alexcstark/rubocop,maxjacobson/rubocop,palkan/rubocop,bquorning/rubocop,savef/rubocop,palkan/rubocop,rrosenblum/rubocop,dreyks/rubocop,meganemura/rubocop,akihiro17/rubocop,sue445/rubocop,volkert/rubocop,vergenzt/rubocop,NobodysNightmare/rubocop,pocke/rubocop,plribeiro3000/rubocop,hanumakanthvvn/rubocop,smakagon/rubocop,volkert/rubocop,bankair/rubocop,petehamilton/rubocop,scottmatthewman/rubocop,mikegee/rubocop,tejasbubane/rubocop,b-t-g/rubocop,maxjacobson/rubocop,mikegee/rubocop,deepj/rubocop,mrb/rubocop,panthomakos/rubocop,mrb/rubocop,lumeet/rubocop,iGEL/rubocop,panthomakos/rubocop,tejasbubane/rubocop,tdeo/rubocop,melch/rubocop,syndbg/rubocop,jmks/rubocop,deivid-rodriguez/rubocop,sinsoku/rubocop,urbanautomaton/rubocop,melch/rubocop,rtlechow/rubocop,jfelchner/rubocop,haziqhafizuddin/rubocop,iGEL/rubocop,mikegee/rubocop,alexdowad/rubocop,mclark/rubocop,bquorning/rubocop,tejasbubane/rubocop,sue445/rubocop,Drenmi/rubocop,plribeiro3000/rubocop,backus/rubocop,alexcstark/rubocop,meganemura/rubocop,deepj/rubocop,hanumakanthvvn/rubocop,vergenzt/rubocop,Drenmi/rubocop,backus/rubocop,jmks/rubocop,bankair/rubocop,dreyks/rubocop,jfelchner/rubocop,lucasuyezu/rubocop,vergenzt/rubocop,petehamilton/rubocop,petehamilton/rubocop,palkan/rubocop,b-t-g/rubocop,jmks/rubocop,bbatsov/rubocop,urbanautomaton/rubocop,legendetm/rubocop,tdeo/rubocop,rrosenblum/rubocop,maxjacobson/rubocop,akihiro17/rubocop,alexdowad/rubocop,NobodysNightmare/rubocop,meganemura/rubocop,mclark/rubocop,sue445/rubocop,syndbg/rubocop,bbatsov/rubocop,deivid-rodriguez/rubocop,pocke/rubocop,ilansh/rubocop,savef/rubocop,deivid-rodriguez/rubocop,rrosenblum/rubocop,jfelchner/rubocop,ilansh/rubocop,haziqhafizuddin/rubocop,sinsoku/rubocop,rtlechow/rubocop,panthomakos/rubocop,smakagon/rubocop,scottmatthewman/rubocop