A new federal lawsuit by California drivers accuses major gas chains, including Walmart and 7-Eleven, and technology company Kalibrate of using AI software to collude and keep pump prices artificially high. The case tests California’s updated antitrust law, which now treats algorithm-driven common pricing as potential price-fixing, amid statewide gas averaging $5.46 a gallon and growing scrutiny of corporate pricing tactics. Real estate and other industries already face probes into algorithm...