It’s going to be an “emotional” return to Buffalo on Sunday for new Patriots wide receiver Stefon Diggs. Reflecting on his four seasons with the Bills ahead of this weekend’s primetime clash against New England, the 31-year-old Diggs expanded on his time in Western New York and what potentially awaits him when he takes the field at Highmark Stadium as an opponent. “To me, obviously, it’s a little sentimental. I spent a lot of time there,” Diggs said Wednesday, according to Boston.com. “I’m real