bug#81516: 31.0.91; delete-file-local-variable(-prop-line) should delete "Local Variables" block (prop-line)

> From: Stefan Monnier <[email protected]>
> Cc: Daniel Mendler <[email protected]>,  Sean Whitton
>  <[email protected]>,  [email protected]
> Date: Wed, 29 Jul 2026 11:12:58 -0400
> 
> >> From: Daniel Mendler <[email protected]>
> >> Cc: [email protected]
> >> Date: Wed, 29 Jul 2026 16:55:27 +0200
> >> 
> >> Eli Zaretskii <[email protected]> writes:
> >> 
> >> >> I suggest to handle both deletion commands the same, remove the faulty
> >> >> prop line, and also the empty local variables block.
> >> >
> >> > Why?
> >> 
> >> Why not?
> >
> > Because a line like that could be present in a Lisp file regardless of
> > local vars, and signaling an error when visiting such a file is a
> > clear bug, IMO.  So we need to fix the error regardless, and removing
> > the remnants of the local vars just sweeps the problem under the
> > carpet.
> >
> > How about the patch below?  Stefan and Sean, any comments?
> 
> The patch looks OK to me, and indeed the most important aspect is to
> remove this error.  But I think it's also a good idea to remove the
> overall block in `delete-file-local-variable(-prop-line)` when that
> block becomes empty, as a matter of aesthetics.

Granted, I'm not opposed to removing those, in addition to fixing the
error.