I don’t consider it summer, officially, until 1) school is out, 2) the weather is oppressively hot, and 3) Jaws is televised once again. And here it is, just when you thought it was safe to go back to the water: Steven Spielberg’s 1975 classic, a self-assured thriller that is equally parts primal tension and charming character acting. Richard Dreyfuss and Robert Shaw, playing off one another, are especially delightful. And Shaw’s late-night monologue about why he’ll never