Performing once more in Sydney this year has been a re-run of the 2016 version of Lerner and Loewe’s musical My Fair Lady, a production directed by Julie Andrews, its original star, and featuring reproductions of the Cecil Beaton costumes. It celebrated the sixtieth anniversary of the musical’s opening in London’s West End, after its triumphant 1956 season on Broadway. The present revival, a romping treat for the eyes and ears, is true to the original 1950s sets and costumes. This adds to our sense of what is an interesting anachronism: Edwardian optimism through the prism of that other most optimistic…