This recipe is very useful when you only have a few lines in each box looking lost or wasting too much space, or when you have a number of boxes and need to make your columns shorter. You would then like to move the infobox content closer to its header. As you are amending the class for the infobox header, all infobox headers will be changed by only changing a single file.
The following screenshot shows you the results of your cooking:
You will love this light and easy snack; so let's get going!
$info_box_contents[] = array(array('text' => tep_draw_separator('pixel_trans.gif', '100%', '1')));
This is a spacer row added between infobox header and content, therefore comment it out so that it looks like this (still all on one line):
// $info_box_contents[] = array(array('text' => tep_draw_separator...