Warning: Parameter id_lang in function displayDate() is deprecated

Question

I got this error in prestashop 1.5

Warning: Parameter id_lang in function displayDate() is deprecated in /Applications/MAMP/htdocs/sviluppo/classes/helper/HelperList.php on line 287 in /Applications/MAMP/htdocs/sviluppo/classes/Tools.php on line 2147

This is the line 287 of HelperList.php

$this->_list[$index][$key] = Tools::displayDate($tr[$key], $this->context->language->id, true);

Answer 1

fixed:

$this->_list[$index][$key] = Tools::displayDate($tr[$key],null , true);