BUFFALO, N.Y. — The gunman in a racist massacre at a Buffalo supermarket last year is scheduled to be sentenced on Wednesday after pleading guilty to a range of state charges in the attack in which he killed 10 people, all of them Black. The gunman, Payton Gendron, pleaded guilty in November to 15 counts, including 10 counts of first-degree murder and a single count of domestic terrorism motivated by hate, which carries a penalty of life imprisonment without parole. Judge Susan Eagan was scheduled to issue her sentence in a hearing on Wednesday morning at the Erie County courthouse....