Multiple help strings break HTML validity in help-block

[optik]

When there are multiple help messages per field (eg. from multiple validators), the resulting output is formatted as an unordered list by django. When wrapped in:

<p class="help-block">
  {{ field.help_text|safe }}
</p>

(templates/bootstrapform/field.html) this produces invalid HTML. As a result, the ul is pushed out of wrapping paragraph, the styling breaks etc.
I believe changing paragraph tag to div would be a pretty safe solution.