message: Fix typo of whether
diff: @@ -486,7 +486,7 @@ pub trait StarlarkValue<'v>:
  Vec::new()
  }
  - /// Tell wether `other` is in the current value, if it is a container.
  + /// Tell whether `other` is in the current value, if it is a container.
  ///
  /// # Examples
  ///
  