improve Pry::LastException docs.
improve Pry::LastException docs.

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