gecko/layout/reftests/columns/columnrule-padding-ref.html

<div style="position: absolute;
  top: 40px; left: 337px;
  width: 6px;
  background-color: red;
  height: 100px;">
</div>
<div style="position: absolute;
  top: 40px; left: 637px;
  width: 6px;
  background-color: red;
  height: 100px;">
</div>
<div style="position: absolute;
  top: 40px; left: 937px;
  width: 6px;
  background-color: red;
  height: 100px;">
</div>
<div style="position: absolute;
  top: 40px; left: 40px;
  -moz-column-count: 4;
  -moz-column-gap: 0px;">
<div style="height:400px;
  width: 300px;
  font-size: 16px;">
Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Sed feugiat libero vel diam. Pellentesque pulvinar commodo lacus. Sed fringilla. Sed lectus. Praesent laoreet orci vitae nisi. Duis venenatis tristique massa.
</div>
</div>