test/docs/source/_static/layout_analysis_group_lines.html

<style>
    td {
        text-align: center;
    }
</style>
<table style="margin: 10px; padding: 10px;">
    <tr>
        <td></td>
        <td></td>
        <td align=right style="border-bottom:1px blue solid">&darr;</td>
        <td></td>
    </tr>
    <tr>
        <td colspan="2" style="border:1px solid"><code>Q u i c k &nbsp; b r o w
            n</code></td>
        <td></td>
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    </tr>
    <tr>
        <td></td>
        <td></td>
        <td align=center valign=center><em><font color="blue">
            L<sub>1</sub>
        </font></em></td>
        <td></td>
    </tr>
    <tr>
        <td style="border:1px solid;">
            <code>f o x</code>
        </td>
        <td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        </td>
        <td align=right style="border-top:1px blue solid">&uarr;</td>
        <td align=center valign=center><em><font color="blue">
            L<sub>2</sub>
        </font></em></td>
    </tr>
    <tr>
        <td></td>
        <td></td>
        <td></td>
        <td align=right style="border-top:1px blue solid">&uarr;</td>
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</table>