Equality check instead of assignment when comparing private properties

[j-machuca]

equals(other: unknown) {
    if (other && typeof other === "object" && #serialNumber in other) {
      other;
      // ^?
      return other.#serialNumber = this.#serialNumber;
    }
    return false;
  }

I believe that the intent was to return true not to assign a new value to #serialNumber