message: core: Implement Display for DisplayValue
  Fix by implementing std::fmt::Display for DisplayValue.
  Fixes:
diff: @@ -495,6 +495,12 @@ impl<T: fmt::Display> fmt::Debug for DisplayValue<T> {
  }
  }
  +impl<T: fmt::Display> fmt::Display for DisplayValue<T> {
  + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
  + fmt::Display::fmt(&self.0, f)
  + }
  +}
  +
  // ===== impl DebugValue =====
  impl<T: fmt::Debug> crate::sealed::Sealed for DebugValue<T> {}
  