docs: add CodeIgniter helper functions as comment

kenjis · kenjis · commit 4b0494bb1eee · 2018-08-14T10:55:46.000+09:00
diff --git a/libraries/Twig.php b/libraries/Twig.php
@@ -41,7 +41,7 @@ class Twig
 	private $functions_safe = [
 		'form_open', 'form_close', 'form_error', 'form_hidden', 'set_value',
 //		'form_open_multipart', 'form_upload', 'form_submit', 'form_dropdown',
-//		'set_radio',
+//		'set_radio', 'set_select', 'set_checkbox',
 	];
 
 	/**
