only in patch2:
unchanged:
--- a/core/lib/Drupal/Core/Menu/ContextualLinkManager.php
+++ b/core/lib/Drupal/Core/Menu/ContextualLinkManager.php
@@ -103,7 +103,7 @@ class ContextualLinkManager extends DefaultPluginManager implements ContextualLi
    *   The request stack.
    */
   public function __construct(ControllerResolverInterface $controller_resolver, ModuleHandlerInterface $module_handler, CacheBackendInterface $cache_backend, LanguageManager $language_manager, AccessManager $access_manager, AccountInterface $account, RequestStack $request_stack) {
-    $this->discovery = new YamlDiscovery('contextual_links', $module_handler->getModuleDirectories());
+    $this->discovery = new YamlDiscovery('links.contextual', $module_handler->getModuleDirectories());
     $this->discovery = new ContainerDerivativeDiscoveryDecorator($this->discovery);
     $this->factory = new ContainerFactory($this);