SACRAMENTO Despite a midsummer heat wave that has pushed energy use to an all-time high this week, experts say Gov. Arnold Schwarzenegger probably does not have to fear the blackouts that ended former Gov. Gray Davis' political career. And he has Davis to thank for that. The long-term contracts Davis signed, at great political cost, guarantee plentiful energy for the next few years at what now look like good rates. "In an interesting twist of fate, he's benefiting from the decisions that his predecessor suffered for," said Frank Wolak, a Stanford economist who specializes in energy. "The terrible contracts" Davis...