proposition: Lemma last_char_in_empty (str : String) (H : length str = 0) ls : last_char_in str ls.
proof: Proof. unfold last_char_in. apply for_last_char_nil; assumption. Qed.
imports: Fiat.Common.Coq__8_4__8_5__Compat Coq.ZArith.ZArith Fiat.Parsers.StringLike.Core Fiat.Parsers.StringLike.Properties Fiat.Parsers.StringLike.ForallChars Fiat.Common