“Well, he had his demons,” we say when we get news of another brilliant artist gone to their grave, if not directly by their own hand, then by bad habits so thoroughly indulged that they might as well have. The literary list is long: Virginia Woolf, Sylvia Plath, F. Scott Fitzgerald, Hunter S. Thompson, David Foster Wallace, and more. Towering over them all, of course, is Ernest Hemingway: terse modernist, wounded veteran, drinker, lover, fighter, hunter, suicide, and subject of master documentary maker Ken Burns’ latest offering. And if Hemingway is about the writer’s larger-than-life life, the series is also about his death.