Drupal.Classes.ClassDeclaration fixer breaks code

Code fixer breaks code like

diff --git a/core/lib/Drupal/Core/Render/Element/Pager.php b/core/lib/Drupal/Core/Render/Element/Pager.php
index 8e87cca..cab5fa1 100644
--- a/core/lib/Drupal/Core/Render/Element/Pager.php
+++ b/core/lib/Drupal/Core/Render/Element/Pager.php
@@ -14,7 +14,7 @@
  *
  * @RenderElement("pager")
  */
-class Pager extends RenderElement{
+class Pager extends {
 
   /**
    * {@inheritdoc}