Fix whitespace

Show/ShowMapper.php

@@ -50,13 +50,13 @@ class ShowMapper
      * @return \Sonata\AdminBundle\Show\ShowMapper
      */
     public function add($name, $type = null, array $fieldDescriptionOptions = array())
-	{
+    {
         if (!$this->currentGroup) {
             $this->with($this->admin->getLabel());
         }
 
         $fieldKey = ($name instanceof FieldDescriptionInterface) ? $name->getName() : $name;
-            
+
         $formGroups = $this->admin->getShowGroups();
         $formGroups[$this->currentGroup]['fields'][$fieldKey] = $fieldKey;
         $this->admin->setShowGroups($formGroups);