diff --git a/core/lib/Drupal/Core/Menu/ContextualLinkInterface.php b/core/lib/Drupal/Core/Menu/ContextualLinkInterface.php
index 0943cda..b1e566b 100644
--- a/core/lib/Drupal/Core/Menu/ContextualLinkInterface.php
+++ b/core/lib/Drupal/Core/Menu/ContextualLinkInterface.php
@@ -51,6 +51,9 @@ public function getOptions();
 
   /**
    * Returns the weight of the contextual link.
+   *
+   * @return int
+   *   The weight as positive/negative integer.
    */
   public function getWeight();
 
diff --git a/core/lib/Drupal/Core/Menu/ContextualLinkManager.php b/core/lib/Drupal/Core/Menu/ContextualLinkManager.php
index 733457b..26937ee 100644
--- a/core/lib/Drupal/Core/Menu/ContextualLinkManager.php
+++ b/core/lib/Drupal/Core/Menu/ContextualLinkManager.php
@@ -54,7 +54,7 @@ class ContextualLinkManager extends DefaultPluginManager {
   protected $controllerResolver;
 
   /**
-   * Constructs a new ContextualLinksManager instance.
+   * Constructs a new ContextualLinkManager instance.
    *
    * @param \Drupal\Core\Controller\ControllerResolverInterface $controller_resolver
    *   The controller resolver.
diff --git a/core/modules/contextual/contextual.module b/core/modules/contextual/contextual.module
index 8831f1a..3829291 100644
--- a/core/modules/contextual/contextual.module
+++ b/core/modules/contextual/contextual.module
@@ -259,11 +259,11 @@ function contextual_pre_render_links($element) {
 
   $contextual_links_manager = \Drupal::service('plugin.manager.menu.contextual_link');
   foreach ($element['#contextual_links'] as $module => $args) {
-    $res = $contextual_links_manager->getContextualLinksArrayByGroup($args[0], $args[1]);
-    if (!empty($res)) {
+    $result = $contextual_links_manager->getContextualLinksArrayByGroup($args[0], $args[1]);
+    if (!empty($result)) {
       unset($element['#contextual_links'][$module]);
     }
-    $items += $res;
+    $items += $result;
   }
 
   // @todo Remove once all contextual links are converted.
diff --git a/core/tests/Drupal/Tests/Core/Menu/ContextualLinkManagerTest.php b/core/tests/Drupal/Tests/Core/Menu/ContextualLinkManagerTest.php
index 70cd370..f1ae065 100644
--- a/core/tests/Drupal/Tests/Core/Menu/ContextualLinkManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Menu/ContextualLinkManagerTest.php
@@ -18,7 +18,7 @@
 class ContextualLinkManagerTest extends UnitTestCase {
 
   /**
-   * The tested contextual link manager manager.
+   * The tested contextual link manager.
    *
    * @var \Drupal\Core\Menu\ContextualLinkManager
    */