chromium/third_party/blink/web_tests/external/wpt/mathml/presentation-markup/operators/operator-dictionary-arabic-001-ref.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8"/>
    <title>Spacing of Arabic operators (reference)</title>
    <link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
    <style>
      mo {
        color: blue;
      }
    </style>
  </head>
  <body>

    <p>There should be no horizontal gaps between the squares:</p>
    <p><math><mn>_</mn><mo lspace="0" rspace="0">&#x1EEF0;</mo><mn>_</mn></math></p>
    <p><math><mn>_</mn><mo lspace="0" rspace="0">&#x1EEF1;</mo><mn>_</mn></math></p>

  </body>
</html>