message: update Display for the BodyProof
diff: @@ -8,7 +8,11 @@ use super::types::{HeaderHash, ChainDifficulty};
  #[derive(Debug, Clone)]
  pub struct BodyProof(Blake2b256);
  -
  +impl fmt::Display for BodyProof {
  + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  + self.0.fmt(f)
  + }
  +}
  impl cbor_event::se::Serialize for BodyProof {
  fn serialize<W: ::std::io::Write>(&self, serializer: cbor_event::se::Serializer<W>) -> cbor_event::Result<cbor_event::se::Serializer<W>> {
  serializer.serialize(&self.0)
  