Add example to assert leading zero mode length.
Add example to assert leading zero mode length.

acrmp/foodcritic,nathenharvey/foodcritic,clintoncwolfe/foodcritic,akihiro17/foodcritic,tas50/foodcritic,chazzly/foodcritic,pkang/foodcritic,Foodcritic/foodcritic,offslinker/foodcritic,docwhat/foodcritic,askl56/foodcritic,coderanger/foodcritic,odcinek/foodcritic