$this->list = $this->getTargetList($this->arg('user'), $this->arg('list_id'));
if (empty($this->list)) {
// TRANS: Client error displayed when referring to a non-existing list.
$this->list = $this->getTargetList($this->arg('user'), $this->arg('list_id'));
if (empty($this->list)) {
// TRANS: Client error displayed when referring to a non-existing list.