*
* @param \Traversable $namespaces
* An object that implements \Traversable which contains the root paths
- * keyed by the corresponding namespace to look for plugin implementations,
+ * keyed by the corresponding namespace to look for plugin implementations.
* @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
* Cache backend instance to use.
* @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler