message: Changes rustc argument from `--force-warns` to `--force-warn`
  The rustc argument was renamed in rust-lang/rust#87346.
diff: @@ -793,7 +793,7 @@ impl FixArgs {
  if let Some(edition) = self.prepare_for_edition {
  if edition.supports_compat_lint() {
  if config.nightly_features_allowed {
  - cmd.arg("--force-warns")
  + cmd.arg("--force-warn")
  .arg(format!("rust-{}-compatibility", edition))
  .arg("-Zunstable-options");
  } else {
  