Tesla Inc. just capped off a quarter as ludicrous and insane as its high-performance electric cars. The oft-erratic Elon Musk spent the last three months making one unforced error after another, the most costly being his problematic tweets about taking Tesla private. He limited the damage in the end by settling fraud charges with U.S. securities regulators, and all the while his company managed to significantly increase production and deliveries of the all-important Model 3 sedan.