bug#57669: 29.0.50; C-n, C-p off under long lines

[dick]

DRC> No Problem? None?
GH>  None, indeed.

languageclient.out
Description: Text document

This is an uncontrived, "in the wild" log file that I was C-n and
C-p'ing when I discovered this "non-problem."

I speculate at least half your users would consider this a regression,
although perhaps not one serious enough to revert your changes.  Some of
them would consider this a bug.