bug#60841: 30.0.50; kill-ring-save pauses despite region being highlighted

[Eli Zaretskii]

> From: Kévin Le Gouguec <kevin.legouguec@gmail.com>
> Cc: gregory@heytings.org,  60841@debbugs.gnu.org
> Date: Sat, 28 Jan 2023 18:45:07 +0100
> 
> diff-mode.el (re. smerge-mode.el) can indeed be fooled into thinking
> diff-changed (re. smerge-refined-changed) differs-from-default, if one
> "shoots their own foot", for example, setting…
> 
> * :extend t:         fixed by this patch                    ✔️
> * :stipple nil:      foot blown with or without the patch   🤷
> * :inherit 'default: foot blown with or without the patch   🤷
> 
> Problem with :stipple nil and :inherit 'default explained in [1].
> indicate-copied-region will become affected if the current patch goes
> in.

I wouldn't be bothered by :stipple whose value is nil.  Why would
someone do such a thing, except when the face is meant to be merged
with other faces (which are expected to have non-nil :stipple
attributes)?

> > Alternatively, we could add a user option to make the swap
> > unconditional, because maybe some users would prefer that to splitting
> > hair in this case.  Then we could stop worrying about all those fine
> > differences.
> 
> Should I cook up a user option to unconditionally do the swap before we
> apply the attached?  Otherwise we may disgruntle trunk users who
> actually liked the behaviour I reported in the OP (swapping regardless
> of whether region stands out).

I guess adding such an option would be a good precaution, indeed.