message: Update tests/build.rs
diff: @@ -43,7 +43,7 @@ fn it_builds_with_webpack_single_js() {
  fn cleanup(fixture: &str) {
  let path = fixture_path(fixture);
  - assert!(path.exists(), format!("{:?} does not exists", path));
  + assert!(path.exists(), format!("{:?} does not exist", path));
  // Workaround https://github.com/rust-lang/rust/issues/29497
  if cfg!(target_os = "windows") {
  