In an already classic “Black Jeopardy” sketch on “Saturday Night Live” aired just before the election, the game show’s categories were all African-American vernacularisms.Guest host Tom Hanks, wearing a red “Make America Great Again” hat, plays Doug, the only white contestant. Doug racks up points with winning responses based on his personal opinions, which are in complete harmony with those of the other contestants, who are black.The sketch resonates so effectively because it …