Prepare accented characters for HTML

[Jon Ribbens]

On 2019-03-28, Tony van der Hoff <lists at vanderhoff.org> wrote:
> Thanks, Chris. The problem is not with the browser, but Jinja crashes.
> Probably a bug, but I'm too wedded to that engine to change now. I'll
> raise it on the Jinja bug site.

It'll almost certainly be a mistake in the way you're using Jinja.
I can't believe nobody's used non-ASCII characters in Jinja before.