diff -u b/core/lib/Drupal/Component/Serialization/ObjectAwareSerializationInterface.php b/core/lib/Drupal/Component/Serialization/ObjectAwareSerializationInterface.php
--- b/core/lib/Drupal/Component/Serialization/ObjectAwareSerializationInterface.php
+++ b/core/lib/Drupal/Component/Serialization/ObjectAwareSerializationInterface.php
@@ -1,7 +1,8 @@
 <?php
 
 namespace Drupal\Component\Serialization;
-// cspell:ignore serializers igbinary
+
+// cspell:ignore serializers igbinary.
 
 /**
  * Ensures that a serializer is usable for serializing PHP objects.