Penalty trouble, power-play stumbles sink Maple Leafs against rival Senators

TORONTO — For all the nuance that can sink a team’s night out on the sheet and all that comes of the complicated alchemy of building chemistry in a locker room that’s seen half a squad turned over, there are some outings that boil down all too simply to the missteps easily diagnosed. A few ill-timed penalties here, a few shots off the bar there, and you end up on the wrong side of things. That much was clear Saturday night as the final buzzer sounded on a messy 3-2 loss under the Scotiabank Arena lights, the Toronto Maple Leafs…