diff --git a/core/modules/block/block.module b/core/modules/block/block.module
index 0b6ca26..4188447 100644
--- a/core/modules/block/block.module
+++ b/core/modules/block/block.module
@@ -26,7 +26,7 @@ function block_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Placing and moving blocks') . '</dt>';
-      $output .= '<dd>' . t('You can place a new block in a region by selecting <em>Place block</em> on the <a href=":blocks">Block layout page</a>. Once a block is placed, it can be moved to a different region by drag-and-drop or by using the <em>Region</em> drop-down list, and then clicking <em>Save blocks</em>.', array(':blocks' => \Drupal::url('block.admin_display'))) . '</dd>';
+      $output .= '<dd>' . t('You can place a new block in a region by selecting <em>Place block</em> on the <a href=":blocks">Block layout page</a>. Once a block is placed, it can be moved to a different region by drag-and-drop or by using the <em>Region</em> drop-down list, and then clicking <em>Save blocks</em>.', [':blocks' => Url::fromRoute('block.admin_display)->toString()]) . '</dd>';
       $output .= '<dt>' . t('Toggling between different themes') . '</dt>';
       $output .= '<dd>' . t('Blocks are placed and configured specifically for each theme. The Block layout page opens with the default theme, but you can toggle to other installed themes.') . '</dd>';
       $output .= '<dt>' . t('Demonstrating block regions for a theme') . '</dt>';