bug#56393: Actually fix the long lines display bug

[Eli Zaretskii]

> From: Drew Adams <drew.adams@oracle.com>
> CC: "larsi@gnus.org" <larsi@gnus.org>,
>         "56393@debbugs.gnu.org"
>       <56393@debbugs.gnu.org>
> Date: Thu, 7 Jul 2022 14:25:12 +0000
> 
> > narrow-mode (ab)uses a feature in a way that...
> 
> If this is really about long-lines display, could
> you please consider not using a name such as
> `auto-narrow-mode' or `narrow-mode' for this?

auto-narrow-mode actually narrows the buffer.

> If the reason for narrowing is only to carry out
> or enable some other action/behavior/feature (e.g.
> something to do with long-lines display?) then
> maybe put that in the name, without `narrow'?
> 
> Will users look for this mode when they want to
> narrow a buffer for some reason?  Or is this just
> something that has to be done in order to effect
> something else - a precondition/dependency?
> 
> IOW, is this the best name, for users?  What will
> a user looking for functions for narrowing think
> when coming across `narrow-mode'?  If this isn't
> something users will generally use for narrowing
> a buffer then at least please make that clear in
> the doc string.

These questions are IMO premature, since the feature is under
development and is not even on master yet.  Hold your horses.