message: derive(Debug) for FrozenStringValue
diff: @@ -54,18 +54,10 @@ use crate::{
  /// let fv: FrozenValue = const_frozen_string!("magic").unpack();
  /// assert_eq!(Some("magic"), fv.to_value().unpack_str());
  /// ```
  -#[derive(Copy, Clone, Dupe, AnyLifetime)]
  +#[derive(Copy, Clone, Dupe, Debug, AnyLifetime)]
  #[repr(C)]
  pub struct FrozenStringValue(FrozenValue);
  -impl Debug for FrozenStringValue {
  - fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
  - f.debug_tuple("FrozenStringValue")
  - .field(&self.unpack())
  - .finish()
  - }
  -}
  -
  /// Wrapper for a [`Value`] which can only contain a [`StarlarkStr`].
  #[derive(Copy, Clone, Dupe, Debug, AnyLifetime)]
  #[repr(C)]
  