code: def sanitize_args(args):
      
      if args.release is None:
          args.release = 'nautilus'
          args.default_release = True
  
      # XXX This whole dance is because --stable is getting deprecated
      if args.stable is not None:
          LOG.warning('the --stable flag is deprecated, use --release instead')
          args.release = args.stable
      # XXX Tango ends here.
  
      return args
docs: args may need a bunch of logic to set proper defaults that argparse is
      not well suited for.