Updated Drupal to 8.6. This goes with the following updates because it's possible...

[yaffs-website] / web / core / modules / book / src / Form / BookAdminEditForm.php

diff --git a/web/core/modules/book/src/Form/BookAdminEditForm.php b/web/core/modules/book/src/Form/BookAdminEditForm.php
index 66e717eaba620fae390c69a12bc7b3ca09e8a1ed..e052b7cff1d9aff2fc0cd8a37b92666bc4ba3796 100644 (file)
--- a/web/core/modules/book/src/Form/BookAdminEditForm.php
+++ b/web/core/modules/book/src/Form/BookAdminEditForm.php
@@ -127,7 +127,7 @@ class BookAdminEditForm extends FormBase {
       }
     }
 
-    drupal_set_message($this->t('Updated book %title.', ['%title' => $form['#node']->label()]));
+    $this->messenger()->addStatus($this->t('Updated book %title.', ['%title' => $form['#node']->label()]));
   }
 
   /**