* @param string $action
* One of:
* - 'create' to generate a URL alias for paths having none.
- * - 'update' to recreate the URL alias for paths already having one, useful if the pattern changed.
+ * - 'update' to recreate the URL alias for paths already having one, useful
+ * if the pattern changed.
* - 'all' to do both actions above at the same time.
* @param array $context
* Batch context.