TOKYO—Canada’s Andre De Grasse added gold to a groaning collection of minor medals with victory in the 200 metres, Kenya went one-two in the men’s 800m and Peruth Chemutai made history for Uganda on another scintillating night of Olympic athletics on Wednesday. That followed another huge 400m hurdles world record in the morning when Sydney McLaughlin saw off fellow American Dalilah Muhammad as the super-fast track and new shoe technology continue to make a mockery of historical comparisons. De Grasse, operating in the considerable shadow of Usain Bolt for most of his career, had won six bronze and two silver medals from global individual races and relays, but has been on fire in Tokyo. Showing perfect judgement he ran down leader Noah Lyles to win in a Canadian record of 19.62 seconds to make him the eighth-fastest man of all time over the distance. “In 2016 I was a kid …