diff -u b/core/modules/entity_reference/src/Plugin/entity_reference/selection/SelectionBase.php b/core/modules/entity_reference/src/Plugin/entity_reference/selection/SelectionBase.php
--- b/core/modules/entity_reference/src/Plugin/entity_reference/selection/SelectionBase.php
+++ b/core/modules/entity_reference/src/Plugin/entity_reference/selection/SelectionBase.php
@@ -17,8 +17,8 @@
 /**
  * Default plugin implementation of the Entity Reference Selection plugin.
  *
- * Also serves as a base class for specific types of entity reference
- * selection plugins.
+ * Also serves as a base class for specific types of Entity Reference
+ * Selection plugins.
  *
  * @see \Drupal\entity_reference\Plugin\Type\SelectionPluginManager
  * @see \Drupal\entity_reference\Annotation\EntityReferenceSelection