diff -u b/core/modules/menu_link_content/menu_link_content.module b/core/modules/menu_link_content/menu_link_content.module
--- b/core/modules/menu_link_content/menu_link_content.module
+++ b/core/modules/menu_link_content/menu_link_content.module
@@ -18,10 +18,10 @@
       $output .= '<h3>' . t('About') . '</h3>';
       $output .= '<p>' . t('The Custom Menu Links module allows users to create menu links. These links can be translated if multiple languages are used for the site.');
       if (\Drupal::moduleHandler()->moduleExists('menu_ui')) {
-        $output .= ' ' . t('It is required by the Menu UI module, which provides an interface for managing menus and menu links. See the <a href="!menu-help">Menu UI module help page</a>, and the <a href="!drupal-org-help">documentation page on drupal.org</a> for more information.', array('!menu-help' => \Drupal::url('help.page', array('name' => 'menu_ui')), '!drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link'));
+        $output .= ' ' . t('It is required by the Menu UI module, which provides an interface for managing menus and menu links. See the <a href="!menu-help">Menu UI module help page</a> and the <a href="!drupal-org-help">documentation page on Drupal.org</a> for more information.', array('!menu-help' => \Drupal::url('help.page', array('name' => 'menu_ui')), '!drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link'));
       }
       else {
-        $output .= ' ' . t('See the <a href="!drupal-org-help">documentation page on drupal.org</a> for  more information. If you enable the Menu UI module, it provides an interface for managing menus and menu links.', array('!drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link'));
+        $output .= ' ' . t('See the <a href="!drupal-org-help">documentation page on Drupal.org</a> for  more information. If you enable the Menu UI module, it provides an interface for managing menus and menu links.', array('!drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link'));
       }
       $output .= '</p>';
       return $output;