#disable_html_escaping()

<table class="keyvalue-table">
    <tr>
        <th>$i18n.getText('template.user.details.username'):</th>
        <td>$textutils.htmlEncode($user.name)</td>
    </tr>
    <tr>
        <th>$i18n.getText('template.user.details.email'):</th>
        <td>$textutils.htmlEncode($user.emailAddress)</td>
    </tr>
    <tr>
        <th>$i18n.getText('template.user.details.fullname'):</th>
        <td>$textutils.htmlEncode($user.displayName)</td>
    </tr>
</table>