ATLANTA — Jon Lester lost his bid for a no-hitter in the eighth inning — a try revived by an official scorer’s reversal — but ended the longest winless streak of his career as the Chicago Cubs shut out the Atlanta Braves 4-0 on Saturday night. A chopper down the line in the Braves’ first by Nick Markakis was originally ruled a hit. The scorer, longtime Atlanta sports writer Jack Wilkinson, changed his call in the top of the seventh and charged an error to third baseman Kris Bryant, who let the ball get under his glove.