message: Fix --clippy arg for fix
diff: @@ -76,7 +76,10 @@ pub fn cli() -> App {
  Arg::with_name("clippy")
  .long("clippy")
  .help("Get fix suggestions from clippy instead of rustc")
  - .hidden(true),
  + .hidden(true)
  + .multiple(true)
  + .min_values(0)
  + .number_of_values(1),
  )
  .after_help(
  "\
  @@ -134,11 +137,13 @@ pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
  let use_clippy = args.is_present("clippy");
  let clippy_args = args
  - .value_of("clippy") // always yields None
  + .value_of("clippy")
  .map(|s| s.split(' ').map(|s| s.to_string()).collect())
  .or_else(|| Some(vec![]))
  .filter(|_| use_clippy);
  + // dbg!(&clippy_args, use_clippy);
  +
  if use_clippy && !config.cli_unstable().unstable_options {
  return Err(failure::format_err!(
  "`cargo fix --clippy` is unstable, pass `-Z unstable-options` to enable it"
  