Issue #3373838 by vengador, DamienMcKenna: Invalid placeholder warning.

CHANGELOG.txt

@@ -12,6 +12,7 @@ Advanced Views RSS Feed 8.x-2.x-dev, 2022-xx-xx
 #3367262 by DamienMcKenna: Don't add empty media:thumbnail element.
 #3203306 by DamienMcKenna, mventure2021, mlncn: Error: Call to undefined
   function Drupal\views_rss\Plugin\views\style\_url().
+#3373838 by vengador, DamienMcKenna: Invalid placeholder warning.
 
 
 Advanced Views RSS Feed 8.x-2.0, 2023-06-14

src/Plugin/views/style/RssFields.php

@@ -255,8 +255,8 @@ class RssFields extends StylePluginBase {
     $form['feed_settings']['absolute_paths'] = [
       '#type' => 'checkbox',
       '#title' => $this->t("Replace relative paths with absolute URLs"),
-      '#description' => $this->t('Enabling this option will replace all relative paths (like <em>/node/1</em>) with absolute URLs (<em>!absolute_url</em>) in all feed elements configured to use this feature (for example &lt;description&gt; element).', [
-        '!absolute_url' => trim($GLOBALS['base_url'], '/') . '/node/1',
+      '#description' => $this->t('Enabling this option will replace all relative paths (like <em>/node/1</em>) with absolute URLs (<em>@absolute_url</em>) in all feed elements configured to use this feature (for example &lt;description&gt; element).', [
+        '@absolute_url' => trim($GLOBALS['base_url'], '/') . '/node/1',
       ]),
       '#default_value' => !empty($this->options['feed_settings']['absolute_paths']),
       '#weight' => 1,