/**
* Constructs this Shell instance.
*
* @param ConsoleOutput $stdout A ConsoleOutput object for stdout.
* @param ConsoleOutput $stderr A ConsoleOutput object for stderr.
* @param ConsoleInput $stdin A ConsoleInput object for stdin.
*/
public function __construct($stdout = null, $stderr = null, $stdin = null)
{
parent::__construct($stdout, $stderr, $stdin);
$this->file = TMP . 'task_retry.txt';
}
