css/CSS2/text/letter-spacing-052.xht

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>CSS Test: Letter-spacing using millimeters with a negative zero value, -0mm</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
        <link rel="help" href="http://www.w3.org/TR/CSS21/text.html#propdef-letter-spacing" />
        <link rel="help" href="http://www.w3.org/TR/CSS21/text.html#spacing-props" />
        <link rel="help" href="https://drafts.csswg.org/css-text-3/#letter-spacing-property"/>
        <link rel="match" href="letter-spacing-004-ref.xht" />
        <meta name="flags" content="ahem" />
        <meta name="assert" content="The 'letter-spacing' property sets a negative zero length value in millimeters." />
        <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
        <style type="text/css">
            div
            {
                font: 24px/1em Ahem;
            }
            div div
            {
                letter-spacing: -0mm;
            }
        </style>
    </head>
    <body>
        <p>Test passes if there is only one box below (with no jagged edges).</p>
        <div>
            <div>xx</div>
        </div>
    </body>
</html>