“Ant-Man” has claimed first place at the box office for the second weekend in a row, narrowly besting new opener “Pixels.” According to Rentrak estimates Sunday, the Marvel and Disney superhero picture brought in $24.8 million over the weekend, bringing its domestic total to $106.1 million. Meanwhile, the R-rated boxing drama “Southpaw” surpassed expectations, earning $16.5 million out of the gates and beating out the young adult adaptation “Paper Towns,” which earned about $12.5 million. That’s a far cry from the $48 million debut of “The Fault in Our Stars” last year.