The following structure is not always properly rendered in mail clients:
```html
<table>
<tbody>
<tr>
<td>
<h1>Text</h1>
<p>Text</p>
</td>
</tr>
</tbody>
</table>
```
where the h1 and p can be any block-level element.
This prevents that from happening by wrapping each block in a separate
row/column combo like so:
```html
<table>
<tbody>
<tr>
<td>
<h1>Text</h1>
</td>
<tr>
<td>
<p>Text</p>
</td>
</tr>
</tbody>
</table>
```
X-original-commit: 01404499277b63dc64a5a26a93bc419cca092440
Part-of: odoo/odoo#80621
Antoine Guenet
9ae5e637e1