Steve Mynott <steve.mynott(a)gmail.com> writes:
In the autumn of 1984 as an undergrad at Durham
University [...] a
strange line editor [...] it seemed to resemble ex. I think I was
told it was written in the UK [...]
ECCE, maybe? This originated at Edinburgh in the late 60s and was ported
to all sorts of languages and platforms. See the DCS archive for many
versions (including several Unix ports with mid-80s dates) and manuals:
http://history.dcs.ed.ac.uk/archive/apps/ecce/
--
Adam Sampson <ats(a)offog.org> <http://offog.org/>