Prepare accented characters for HTML

[Richard Damon]

> On Mar 28, 2019, at 7:53 AM, 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.
> 

Using Google, it says that Jinja2 is Unicode capable, if you are using the first version of Jinja, it may be that it is know to not handle Unicode well (a bytes/string issue) and simply updating to Jinja2 may be simple.