chromium/third_party/blink/web_tests/external/wpt/css/css-break/reference/widows-orphans-001-ref.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Fragmentation level 3 Test Reference File</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
<style>
div {
  position: absolute;
  columns: 2;
  column-fill: balance-all;
  column-gap: 0;
}
</style>
<body>
  <p>Test passes if there are 4 “X” characters <strong>arranged in a 2 by 2 square</strong> below.

  <div>X<br>X<br>X<br>X</div>
</body>