Stop the presses. “Jeopardy” host Alex Trebek, 59, has shaved off his mustache, 20. The razor apparently went to his upper lip during a recent lunch break between tapings of the popular quiz show. “It was really a last-minute thing,” an insider told the New York Post. The newly-exposed gap between Trebek’s nose and mouth is not expected to make its TV debut until late September, when the shows that are now being taped hit the air.