Tiny changes to add the type of a variable.

Author: tiagosampaio

app/code/Magento/Backend/Block/Widget/Tabs.php

@@ -238,7 +238,7 @@ protected function _beforeToHtml()
         $this->_tabs = $this->reorderTabs();
 
         if ($this->_activeTab === null) {
-            /** @var  $tab */
+            /** @var TabInterface $tab */
             foreach ($this->_tabs as $tab) {
                 $this->_activeTab = $tab->getId();
                 break;
@@ -309,7 +309,7 @@ protected function reorderTabs()
 
         $ordered = [];
 
-        /** @var  $tab */
+        /** @var TabInterface $tab */
         foreach ($orderByPosition as $tab) {
             $ordered[$tab->getId()] = $tab;
         }