ATLANTA—The Atlanta Braves know what happened last October and want to avoid a repeat. The Los Angeles Dodgers plan on an encore. Atlanta held 2-0 and 3-1 leads in the NL Championship Series before the Dodgers won three consecutive games in a playoff entirely at the neutral ballpark of Arlington, Texas, then beat Tampa Bay for their first World Series title since 1988. The host Braves won the first two games of this year’s NLCS, then LA took two of three at Dodger Stadium forcing a Game 6 back at Truist Park on Saturday night with the Braves still one win from their first Series trip since 1999. “I think we’ve got a mental advantage right now, getting back on that plane and going back there playing Game 6,” Dodgers manager Dave Roberts said Friday. “History’s a powerful thing to the mind, and so we feel good and I think …