The battle lines are drawn: It’s La La Land, a musical fantasy about white lovers in Hollywood, versus Moonlight, a searing drama about black youth surviving on the streets of Miami. That contest is symptomatic of how serious Oscar is – or isn’t – about diversity. After two years in which not a single black actor showed up among the acting nominees, this year’s crop includes seven actors of color: Mahershala Ali, Viola Davis, Naomie Harris, Ruth Negga, Dev Patel, Octavia Spencer and Denzel Washington.