In a regulatory filing out Friday, Elon Musk-led automaker Tesla announced a change to its corporate bylaws that will limit shareholders ability to sue the company if investors believe the company's board or executives committed any breach of fiduciary duties.The filing says the new bylaw went into effect as of May 15, and that Tesla has adopted "an ownership threshold requiring any shareholder or group of shareholders to hold shares of common stock sufficient to meet an ownership threshold of at least 3% o ...