message: Single slash root on Windows
diff: @@ -38,7 +38,7 @@ fn pathless_tools() {
  #[test]
  fn absolute_tools() {
  let target = rustc_host();
  - let root = if cfg!(windows) { r#"C:\\"# } else { "/" };
  + let root = if cfg!(windows) { r#"C:\"# } else { "/" };
  // Escaped as they appear within a TOML config file
  let config = if cfg!(windows) {
  