Cast tick label to string prior to `replace` call
Cast tick label to string prior to `replace` call

In the edge case that an actual integer, or other non-string, is passed as a label, it must be cast to String before `replace` can safely be called.
chiu/flot,klarkc/flot,colinhunt/flot,gdseller/flot,pepperdata/flot,kongx73/flot,chaveiro/flot,ni-kismet/engineering-flot,andig/flot,MAMISHO/flot,stanislavdavid/flot,mlitwiniuk/flot,chiu/flot,resnick1223/flot,Ninir/flot,chiu/flot,chaveiro/flot,magora-suchkov/flot,Ninir/flot,matong/flot,chaveiro/flot,cipix2000/engineering-flot,lolifans/flot,wet-boew/flot,saike/flot,TrainingPeaks/flot,Sensirion/flot,k-joseph/flot,k-joseph/flot,saike/flot,andig/flot,wet-boew/flot,cipix2000/flot,mlitwiniuk/flot,flot/flot,soenter/flot,resnick1223/flot,saike/flot,octavianCraciun/engineering-flot,mcanthony/flot,stanislavdavid/flot,cipix2000/flot,fashionsun/flot,resnick1223/flot,trask/flot,sedran/flot,petrvacha/flot,andig/flot,mlitwiniuk/flot,stanislavdavid/flot,soenter/flot,k-joseph/flot