implement Behavior#merge! on top of Behavior#[]=.
implement Behavior#merge! on top of Behavior#[]=.

ngpestelos/pry,ngpestelos/pry,shockone/pry,geoffreylitt/pry,85x14/pry,85x14/pry,nju520/pry,shockone/pry,ooohiroyukiooo/pry,scalixte-mdsol/pry,gfvcastro/pry,scalixte-mdsol/pry,jasnow/pry,pvdb/pry,gfvcastro/pry,jasnow/pry,printercu/pry,nju520/pry,raeno/pry,ooohiroyukiooo/pry,caporta/pry,printercu/pry,tdg5/pry,bronzdoc/pry,raeno/pry,sideci-sample/sideci-sample-pry,icebreaker/pry,ooohiroyukiooo/pry,caporta/pry,raeno/pry,icebreaker/pry,bronzdoc/pry,pvdb/pry,jasnow/pry,jasonm23/pry,jasonm23/pry,shockone/pry,jasonm23/pry,scalixte-mdsol/pry,sferik/pry,caporta/pry,85x14/pry,josue804/debunker,tdg5/pry,tdg5/pry,josue804/debunker,geoffreylitt/pry,nju520/pry,sferik/pry