proposition: Lemma drop_of_string (n : nat) str : drop n (of_string str) =s of_string (List.drop n str).
proof: Proof. apply bool_eq_from_get. intro n'; rewrite get_drop', !get_of_string, nth_error_drop. 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