The Las Vegas Review-Journal will no longer print its rival the Las Vegas Sun for the first time in decades, sharpening a longtime legal dispute between the southern Nevada newspapers. The papers will be in court Friday, and the Sun hopes a judge will order printing to resume immediately. The nation's last joint operating agreement stems from a 1970 law designed to preserve newspapers. The Review-Journal printed the Sun as an insert, but both companies have separate newsrooms and websites. The Review-Journal argued in an editorial Friday that readers now get their information and entertainment from a variety of outlets, including online, so the paper shouldn't have to pay to print a competitor.