Clean (demo-)data to be fully editor-friendly (i.e. use `<p><br><p>` instead of `<br>` between paragraphs), fix some (grammar) typos. Task-2893398 closes odoo/odoo#94943 X-original-commit: 87b4bc6d19fef947f7bf5d15835f17b9c2019902 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>