proposition: Lemma list_of_string_of_list ls : list_of_string (string_of_list ls) = ls.
proof: Proof. induction ls; simpl; rewrite ?IHls; 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