Query URL Strings Not Passed to l() Correctly

The entire url is passed to the l() function which incorrectly encodes query strings, breaking the url. This can be resolved by changing the two occurrences of:

$html = l($display_term, $url, array('title' => "reference on $display_term", 'target' => $target));

to:

$url = explode('?', $url);
$html = l($display_term, $url[0], array('title' => "reference on $display_term", 'target' => $target, 'query' => $url[1]));