Odoo-Build/snippets/sale.report_saleorder_document.convert_html_note.xml

<data inherit_id="sale.report_saleorder_document" priority="50">
    <xpath expr="//td[@name='td_note_line']/.." position="replace">
        <t t-if="line.display_type == 'line_note' and not '&lt;!DOCTYPE html&gt;' in line.name">
            <td name="td_note_line" colspan="99">
                <span t-field="line.name"/>
            </td>
        </t>
    </xpath>
    <xpath expr="//td[@name='td_section_subtotal']/../.." position="after">
        <t t-if="line.display_type == 'line_note' and '&lt;!DOCTYPE html&gt;' in line.name">
            <td name="td_html_line" colspan="99">
                <t t-raw="line.name.replace('&lt;!DOCTYPE html&gt;', '')"/>
            </td>
        </t>
    </xpath>
</data>