message: Replace str transmute call with str::from_utf8
diff: @@ -455,7 +455,7 @@ impl Eq for DynFixedString<'_> {}
  impl Debug for DynFixedString<'_> {
  fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  - let s = unsafe { mem::transmute::<_, &str>(self.get_buf()) };
  + let s = unsafe { std::str::from_utf8_unchecked(self.get_buf()) };
  Debug::fmt(&s, f)
  }
  }
  