Package: Emacs
Version: 30.0.50


Here's a funny corner case I just bumped into:

- Apply the `smerge-mode.patch` below to Emacs's` master` (and
  recompile `smerge-mode.el`).
- Open the short diff file below with:

    emacs -Q --eval '(setq-default word-wrap t diff-font-lock-prettify t)' \
          .../bug-weird-next-line.diff

- In my case, when this opens there's a "word wrap" just before "This"
  and just before "\id{seg}" (on the 4th and 5th lines, resp).
  If that's not the case for you, resize your frame so that this is
  the case.

- Do `C-n` a few times.

What I see is that `C-n` jumps down to the "T" of the word-wrapped
"This" as it should, but that the next `C-n` doesn't jump to the next
(visual) line but jumps to the "s" of "This" instead.
The same kind of misbehavior occurs on the next (logical) line with
"\id{seg}".


        Stefan