Hrvoje Niksic <hniksic(a)srce.hr> writes:
Take a buffer portion, mark it and narrow it with `C-x n n'. It
is
important that the beginning of the narrowed portion is *not* at the
beginning of a line.
...
This has been there for quite some time (at least since 20.2,
probably
since 19.12 or longer),
Yowza. It *is* in 19.12. This is an _old_ bug ...
and is likely the result of `widen' not
getting the attention of the relevant redisplay structures. FSFmacs
does not exhibit this behaviour.