The Mavericks are past the fun, plucky underdog story. There was a moment in the third quarter, after the Mavericks had already amassed a staggering 42 point lead in Game 7 on the road against the Suns, where Devin Booker thought he had a prime mismatch against Mavericks backup sharpshooter Davis Bertans. Booker attacked Bertans, and then something weird happened — he didn’t score. In fact Booker attacked two players the Suns have tried to target the whole series, as Luka Doncic also came in to help. Bertans even committed the cardinal sin on defense by getting turned around by…