Plays by Ken Ludwig are popping up in a lot of theaters this summer because the clever writer creates the most delicious comedies. “The Fox on the Fairway,” opening Sept. 9 at the North Coast Repertory Theatre, joins Ludwig’s list of fabulous farces, which include “Lend Me a Tenor,” “Moon Over Buffalo,” and now playing at The Old Globe, “Baskerville: A Sherlock Holmes Mystery.”