diff --git a/core/lib/Drupal/Component/Plugin/CategorizingPluginManagerInterface.php b/core/lib/Drupal/Component/Plugin/CategorizingPluginManagerInterface.php
index bb9df77..9bb7d2b 100644
--- a/core/lib/Drupal/Component/Plugin/CategorizingPluginManagerInterface.php
+++ b/core/lib/Drupal/Component/Plugin/CategorizingPluginManagerInterface.php
@@ -21,10 +21,11 @@
   public function getCategories();
 
   /**
-   * Gets sorted definitions.
+   * Gets sorted plugin definitions.
    *
    * @param array[]|null $definitions
-   *   (optional) The definitions to sort. If omitted, all definitions are used.
+   *   (optional) The plugin definitions to sort. If omitted, all plugin
+   *   definitions are used.
    *
    * @return array[]
    *   An array of plugin definitions, sorted by category and label.
@@ -32,14 +33,14 @@ public function getCategories();
   public function getSortedDefinitions(array $definitions = NULL);
 
   /**
-   * Gets sorted definitions grouped by category.
+   * Gets sorted plugin definitions grouped by category.
    *
    * In addition to grouping, both categories and its entries are sorted,
-   * whereas definitions are sorted by label.
+   * whereas plugin definitions are sorted by label.
    *
    * @param array[]|null $definitions
-   *   (optional) The definitions to group. If omitted, all definitions are
-   *   used.
+   *   (optional) The plugin definitions to group. If omitted, all plugin
+   *   definitions are used.
    *
    * @return array[]
    *   Keys are category names, and values are arrays of which the keys are
diff --git a/core/lib/Drupal/Core/Plugin/CategorizingPluginManagerTrait.php b/core/lib/Drupal/Core/Plugin/CategorizingPluginManagerTrait.php
index 6cb8c5a..66fa31c 100644
--- a/core/lib/Drupal/Core/Plugin/CategorizingPluginManagerTrait.php
+++ b/core/lib/Drupal/Core/Plugin/CategorizingPluginManagerTrait.php
@@ -31,7 +31,7 @@
   protected $moduleData;
 
   /**
-   * Processes a definition to ensure there is a category.
+   * Processes a plugin definition to ensure there is a category.
    *
    * If the definition lacks a category, it defaults to the providing module.
    *
diff --git a/core/tests/Drupal/Tests/Core/Plugin/CategorizingPluginManagerTraitTest.php b/core/tests/Drupal/Tests/Core/Plugin/CategorizingPluginManagerTraitTest.php
index 7c151c0..8c6fee9 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/CategorizingPluginManagerTraitTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/CategorizingPluginManagerTraitTest.php
@@ -90,6 +90,7 @@ public function testProcessDefinitionCategory() {
       $this->pluginManager->processDefinition($definition, 'some');
       $this->assertSame($definition['category'], 'Node');
     }
+
   }
 
   /**
@@ -134,7 +135,9 @@ public function processDefinition(&$definition, $plugin_id) {
       parent::processDefinition($definition, $plugin_id);
       $this->processDefinitionCategory($definition);
     }
+
   }
+
 }
 
 namespace {
@@ -147,5 +150,7 @@ public function processDefinition(&$definition, $plugin_id) {
     function system_get_info($type, $name = NULL) {
       return ['node' => ['name' => 'Node']];
     }
+
   }
+
 }