bug#56682: feature/improved-locked-narrowing 9dee6df39c: Reworked locked narrowing.

[Gregory Heytings]

> > Fwiden in the functions above (which are AFAICS the only places in 
> > Emacs where Fwiden is called) is not prepared to the possibility of 
> > them being called inside a labeled narrowing, either one installed by 
> > the long lines code, or another one.  Basically we need to use a 
> > variant of reset_outermost_narrowings (for the current buffer only) 
> > where we use
> >
> > record_unwind_protect (save_restriction_restore, save_restriction_save ());
>
> Ah, okay.  Please do, and thanks.

And here's the patch!

Remove-narrowing-locks-before-calling-Fwiden.patch
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