message: code golfing
diff: @@ -173,9 +173,9 @@ impl DigestBlake2b {
  }
  impl fmt::Display for DigestBlake2b {
  fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  - for &byte in self.0.iter() {
  - write!(f, "{:x}", byte);
  - };
  + self.0.iter().for_each(|byte| {
  + write!(f, "{:x}", byte).unwrap()
  + });
  Ok(())
  }
  }
  