Issue #3490965: Fix non translatable message in rename UI

src/Form/FileRenameForm.php

@@ -63,7 +63,7 @@ class FileRenameForm extends ContentEntityForm {
     ];
 
     $form['info'] = [
-      '#markup' => '<p>This page opened in a new tab.<br>After you save this form, <b>return to your original tab</b> to make sure you save any changes you made there.</p>',
+      '#markup' => $this->t('<p>This page opened in a new tab.<br>After you save this form, <b>return to your original tab</b> to make sure you save any changes you made there.</p>'),
     ];
 
     $form['usages'] = [