A divided federal appeals court Thursday cleared the way for the public to learn more about a 1942 investigation into whether the Chicago Tribune was guilty of espionage.In a 2-1 decision, the 7th U.S. Circuit Court of Appeals rejected arguments that a judge overstepped his bounds when he ordered the release of transcripts of testimony given in the inquiry before a federal grand jury.Federal trial judges have inherent supervisory authority over the administration of grand juries, the 7th Circuit’s majority wrote.The …