<!DOCTYPE html>
<html>
  <head>
    <title>Stretchy mover</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
  </head>
  <body>
    <!-- See bug 687807 -->
    <math display=block>
     <mrow>
     <mspace depth="50em"/>
      <mrow>
        <mover>
          <mo stretchy="true">&#x2192;</mo>
          <mn>BBBBBBBBB</mn>
        </mover>
      </mrow>
      <mspace depth="50em"/>
     </mrow>
    </math>
  </body>
</html>
