Dunkin’ doughnuts and coffee is being combined with Buffalo Wild Wings and Arby’s sandwiches.Inspire Brands Inc. said Friday that it is acquiring Dunkin’ Brands Group Inc. for $11.3 billion, including the Dunkin’ Brands’ debt that Inspire will be taking on. The private-equity firm will pay $106.50 in cash for all of Dunkin’ Brands’ shares, which closed Friday at $99.71. Dunkin’ Brands’ stock surged to an