fix - Custom caption with tokens doesn't render HTML characters

Related to #3469260

colorbox.theme.inc

@@ -10,6 +10,7 @@ use Drupal\Component\Utility\Xss;
 use Drupal\file\Entity\File;
 use Drupal\image\Entity\ImageStyle;
 use Drupal\responsive_image\Entity\ResponsiveImageStyle;
+use Drupal\Component\Utility\Html;
 
 /**
  * Prepares variables for colorbox formatter templates.
@@ -429,5 +430,5 @@ function _colorbox_formatter_get_caption(&$variables) {
   if (((strpos($colorbox_style, 'colorbox/example') !== FALSE) || $config->get('colorbox_caption_trim')) && (strlen($caption) > $trim_length)) {
     $caption = substr($caption, 0, $trim_length - 5) . '...';
   }
-  return Xss::filter($caption);
+  return Html::decodeEntities(Xss::filter($caption));
 }