diff --git a/claro.theme b/claro.theme
index 80ca173..c63a602 100644
--- a/claro.theme
+++ b/claro.theme
@@ -276,7 +276,7 @@ function claro_element_info_alter(&$type) {
 }
 
 /**
- * Prerender callback for Vertical Tabs element
+ * Prerender callback for Vertical Tabs element.
  */
 function _claro_vertical_tabs_prerender($element) {
   // If the vertical tabs have a details group, add attributes to those details
@@ -292,7 +292,7 @@ function _claro_vertical_tabs_prerender($element) {
     $last_group_with_child_key = NULL;
     $last_group_with_child_key_last_child_key = NULL;
 
-    foreach($group_keys as $group_key) {
+    foreach ($group_keys as $group_key) {
       $children_keys = Element::children($element['group']['#groups'][$group_key], TRUE);
 
       foreach ($children_keys as $child_key) {
@@ -305,7 +305,7 @@ function _claro_vertical_tabs_prerender($element) {
           $element['group']['#groups'][$group_key][$child_key]['#vertical_tab_item'] = TRUE;
 
           if ($first_key) {
-          $element['group']['#groups'][$group_key][$child_key]['#attributes']['class'][] = 'vertical-tabs__item--first';
+            $element['group']['#groups'][$group_key][$child_key]['#attributes']['class'][] = 'vertical-tabs__item--first';
             $first_key = FALSE;
           }