public function render($format = 'd.m.Y H:i:s') {
		$output = $this->getContext() . ': ';
	    $date = $this->extractDateFromRevisionFile();
	    if ($date === null) {
	        $date = $this->extractDateFromSurfPath();
        }
	    if ($date === null) {
	        $date = new \DateTime('now');
        }

	    $output.= $date->format($format);
	    $output.= $this->extractRevisionFileContent();

		return $output;
	}