I'll be able to try a bit later, but does it handle UTF-8 correctly? I remember having some versions of nvi split characters through the middle when doing e.g. folding back in the day.

EDIT: Sorry, I'm a dum-dum, it's written in the README:

> No support for Unicode / UTF-8 / wide character display

> Multibyte support is planned, but is unfortunately non-trivial, […]