fixed phpcs issues

Closes #3447535

src/Entity/Fragment.php

@@ -2,11 +2,11 @@
 
 namespace Drupal\fragments\Entity;
 
-use Drupal\Core\Entity\EntityStorageInterface;
-use Drupal\Core\Field\BaseFieldDefinition;
-use Drupal\Core\Entity\RevisionableContentEntityBase;
 use Drupal\Core\Entity\EntityChangedTrait;
+use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Entity\RevisionableContentEntityBase;
+use Drupal\Core\Field\BaseFieldDefinition;
 use Drupal\user\UserInterface;
 
 /**