MONTREAL — Patrik Laine scored on the power play again, and the Montreal Canadiens beat the Detroit Red Wings for the second straight night, winning 5-1 on Saturday. Juraj Slafkovsky, Jake Evans, Emil Heineman and Brendan Gallagher also scored in Montreal’s season-high third straight win. Key moment Laine broke Moritz Seider’s stick with a shot for the second straight night, …