In a cover story for Vanity Fair, titled “The Supercalifragilistic Lin-Manuel Miranda,” writer Bruce Handy explores both the upcoming movie, Mary Poppins Returns, as a sequel to Walt Disney’s 1964 adaption of the children’s books by P. L. Travers, and one of its stars, Lin-Manuel Miranda ’02, Hon. '15. In the 1964 movie, the chimney-sweep companion to Mary Poppins (Julie Andrews) was Bert, played by Dick Van Dyke. This 2018 Mary Poppins (Emma Blunt) has chimney sweep Jack (supposedly a former protégé of the late Bert), played by Miranda, as her sidekick and friend. Hardy offers biographical background, along with personal…