Issue #3003610: Remove block.module dependency from Layout Builder

core/lib/Drupal/Core/Template/Loader/FilesystemLoader.php

@@ -12,7 +12,7 @@
  *
  * This loader adds module and theme template paths as namespaces to the Twig
  * filesystem loader so that templates can be referenced by namespace, like
- * @block/block.html.twig or @my_theme/page.html.twig.
+ * @system/block.html.twig or @my_theme/page.html.twig.
  */
 class FilesystemLoader extends TwigFilesystemLoader {