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

[dick]

> This kind of ad hominem usually means you've run out of real
> arguments.

Took the words right out of my mouth:

  Bug#57212
  If you'd read the code guarded by that flag and understand what it
  does, you wouldn't have made such nonsensical proposals.

  Bug#57669
  And that is _after_ you factor out changes that are plain wrong,
  because he simply didn't understand what the code does well enough.