Indigo Girls -- no “the” -- have been hits since their first release in 1985. One of the most successful and influential Georgia-formed groups, the folk rock pair have gone platinum and won a Grammy, too. They have a show tonight, Sept. 27, at Atlanta Symphony Hall with the Atlanta Symphony Orchestra. We revisit an interview with one half of the group, Amy Ray. Atlanta gets more robocalls than any other city in the United States. If that’s not bad enough, in August the city broke its own record