tidy up code in Pry::Config.
tidy up code in Pry::Config.

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