fact: Definition ByteString_append (bs bs' : ByteString) : ByteString := let bs'' := fold_right ByteString_push_char bs' (byteString bs) in ByteString_push_word (front bs) bs''.
imports: Fiat.Common.Coq__8_4__8_5__Compat Bedrock.Word Coq.ZArith.ZArith Coq.NArith.NArith Coq.Arith.Arith Coq.Numbers.Natural.Peano.NPeano Coq.Logic.Eqdep_dec Fiat.Narcissus.Common.Specs