message: doc: remove extra brackets
diff: @@ -46,11 +46,11 @@ import { NavigationFailureType, isNavigationFailure } from 'vue-router'
  // trying to leave the editing page of an article without saving
  const failure = await router.push('/articles/2')
  +
  if (isNavigationFailure(failure, NavigationFailureType.aborted)) {
  // show a small notification to the user
  showToast('You have unsaved changes, discard and leave anyway?')
  }
  -})
  ```
  ::: tip
  