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<html>
  <head>
    <title>Bug 848725</title>
    <meta charset="utf-8"/>
  </head>
  <body>
    <div>
      <math>
        <mover>
          <mo>&#x21A1;</mo>
          <mspace height="500px"></mspace>
        </mover>
      </math>
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</html>
