message: Change String capacity in hex function
diff: @@ -33,7 +33,7 @@ macro_rules! matches {
  #[must_use]
  pub fn hex(buf: &[u8]) -> String {
  - let mut ret = String::with_capacity(10 + buf.len() * 3);
  + let mut ret = String::with_capacity(buf.len() * 2);
  for b in buf {
  ret.push_str(&format!("{:02x}", b));
  }
  