<html class="reftest-wait">
<head>
 <script>
  function tweak() {
    document.getElementById('p').textContent = 'below';
    document.documentElement.className = '';
  }
 </script>
</head>
<body onload="tweak()">
 <div style="column-width: 60px; height: 60px; background: yellow;">
   title
   <p id="p" style="background: lightgreen">
     line
     break
     [middle]
     line
     break
     [middle]
     line
     break
     [middle]
     line
     break
   </p>
 </div>
</body>
</html>