Fresh Europe data on August Tesla registrations wasn't pretty.Tesla (TSLA 3.94%) shares fell more than 4% last Thursday as investors digested disappointing Tesla vehicle registration data in Europe ahead of the company's third-quarter deliveries update expected in early October. The electric vehicle maker sells premium battery-electric cars and energy storage products globally, with meaningful exposure to the European market.The market's question now is simple: Does the regional weakness point to a poor qua ...