It rose nearly 2%, helped also by a pullback in U.S. Treasury yields, while copper futures HGc1 advanced 3.8%. Among the largest percentage gainers on the TSX were Eldorado Gold Corp ELD.TO, which rose 9.3%, and Blackberry Ltd BB.TO, which ended 4.7% higher. By Fergal Smith TORONTO, Oct 13 (Reuters) - Canada's main stock index climbed to a four-week high as hot U.S. inflation data bolstered the attractiveness of metal mining shares, while the technology group also gained ground.