How do I prevent the HTML markup in an item list from being escaped?
$items[] = [
  '#markup' =&gt; Link::fromTextAndUrl($text, $url)-&gt;toString() . ': ' . t('Visit this page to import a book') . '.',
];

$form['mei_marc_list'] = [
  '#theme' =&gt; 'item_list',
  '#items' =&gt; $items,
];

return $form;