missing apostrophe in official sample code

[eluser]Unknown[/eluser]
http://ellislab.com/codeigniter/user-gui...oader.html

syntax error in $config array
[code]
$config = array (
'mailtype' => 'html',
'charset' => 'utf-8,
'priority' => '1'
);

$this->load->library('email', $config);
[code]