proposition: Lemma substring_correct3' {s : string} : substring 0 (length s) s = s.
proof: Proof. apply substring_correct3; reflexivity. Qed.
imports: Fiat.Common.Coq__8_4__8_5__Compat Coq.ZArith.ZArith Coq.Arith.PeanoNat Coq.Strings.Ascii Coq.Strings.String Fiat.Common.List.Operations Fiat.Common.StringOperations