docs: def environment_args(subparsers):
      """Add command line options for the environment operation"""
      env_parser = subparsers.add_parser('environment')
      env_parser.add_argument('vault_paths',
                              help='Full path(s) to secret',
                              nargs='+')
      env_parser.add_argument('--prefix',
                              dest='prefix',
                              help='Old style prefix to use when'
                              'generating secret key names')
      export_arg(env_parser)
      mapping_args(env_parser)
      base_args(env_parser)