Update comment

crates/oxc_transformer/src/es2022/class_properties/private.rs

@@ -1102,9 +1102,11 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
     ///
     /// Returns:
     ///   * Bound Identifier: `A` -> `A === null || A === void 0`
+    ///   * `this`: `this` -> `this === null || this === void 0`
     ///   * Unbound Identifier or anything else: `A.B` -> `(_A$B = A.B) === null || _A$B === void 0`
     ///
-    /// NOTE: This method will mutate the passed-in `object` to a second expression of [`Self::duplicate_object`] return.
+    /// NOTE: This method will mutate the passed-in `object` to a second copy of
+    /// [`Self::duplicate_object`]'s return.
     fn transform_expression_to_wrap_nullish_check(
         &mut self,
         object: &mut Expression<'a>,