message: default to auto color, not never
diff: @@ -432,7 +432,8 @@ async fn run_path(args: &Args, options: &rune::Options, path: &Path) -> Result<E
  ColorChoice::Never
  }
  }
  - _ => ColorChoice::Never,
  + "never" => ColorChoice::Never,
  + _ => ColorChoice::Auto,
  };
  let mut out = StandardStream::stdout(choice);
  