<!DOCTYPE html>
<script>
    onload = function() {
        var elm = document.getElementById('elm');
        document.body.offsetTop; // trigger layout
        elm.style.display = 'block';
    }
</script>
<p>Test insertion of a spanner after column content.</p>
<p>There should be two lines below with the word "PASS". Letter spacing is expected to
vary. The first word should be in <span style="color:blue;">blue</span>. The second one
in <span style="color:olive;">olive</span>.</p>
<div style="-webkit-columns:5; -webkit-column-gap:0; width:5em; color:blue;">
    P<br>A<br>S<br>S
    <div id="elm" style="display:none; -webkit-column-span:all; color:olive;">PASS</div>
</div>