message: Write sitedir to stdout instead of stderr
diff: @@ -1496,7 +1496,8 @@ def main_with_args(args):
  """
  if args.sitedir:
  - raise SystemExit(os.path.dirname(__file__))
  + print(os.path.dirname(__file__)))
  + raise SystemExit
  # check command line options
  if len(args.filename) == 0:
  