proposition: Lemma fold_lookahead'_nil {A} (f : Char -> option Char -> A -> A) (init : A) (str : String) : fold_lookahead' f init str 0 = init.
proof: Proof. reflexivity. Qed.
imports: Fiat.Common.Coq__8_4__8_5__Compat Coq.ZArith.ZArith Fiat.Common Fiat.Common.List.Operations Fiat.Common.List.ListFacts Fiat.Common.Le Fiat.Common.Tactics.SetoidSubst Fiat.Common.Tactics.IsClosed Fiat.Parsers.StringLike.Core Fiat.Common.UIP