refactor(05): use better example of overloading
refactor(05): use better example of overloading

fpvandoorn/tutorial,Hodapp87/cs6460_project,leanprover/tutorial,fpvandoorn/tutorial,avigad/tutorial,soonhokong/lean-tutorial,Hodapp87/cs6460_project,avigad/tutorial,leanprover/tutorial,fpvandoorn/tutorial,soonhokong/lean-tutorial,avigad/tutorial,leanprover/tutorial,soonhokong/lean-tutorial,Hodapp87/cs6460_project