Add details to "other" failure to escape comment

Author: sirreal

src/wp-includes/html-api/class-wp-html-tag-processor.php

@@ -3883,7 +3883,8 @@ static function ( $matches ) {
 						);
 					} else {
 						/*
-						 * Other types of script tags cannot be escaped safely.
+						 * Other types of script tags cannot be escaped safely because the type
+						 * of comment and escaping strategy are unknown.
 						 */
 						return false;
 					}