[ticket/13801] Updated comments for clarity

PHPBB3-13801

phpBB/includes/message_parser.php

@@ -1256,6 +1256,7 @@ class parse_message extends bbcode_firstpass
 		{
 			foreach ($errors as $i => $args)
 			{
+				// Translate each error with $user->lang()
 				$errors[$i] = call_user_func_array(array($user, 'lang'), $args);
 			}
 			$this->warn_msg = array_merge($this->warn_msg, $errors);