remove line break?

How do I output these two form items on the same line? I can't get the automatic line break out.

$form .= form_select('Manager #2', 'mid2', $mid2, $options, NULL, 0, FALSE, FALSE);
$form .= form_select('Manager #3', 'mid3', $mid3, $options, NULL, 0, FALSE, FALSE);

TIA,
Billy