Mauro Aranda <maurooaranda@gmail.com> writes:

> Kévin Le Gouguec <kevin.legouguec@gmail.com> writes:
>
>> How does the attached look?
>
> I think the change looks good.  I've just realized that the other caller
> of button--properties might need a tweak.
>
> In unbuttonize-region, we should change this call:
> (remove-text-properties start end
>                             (button--properties nil nil nil))
>
> to:
> (remove-text-properties start end
>                             ;; t to ensure help-echo gets reset.
>                             (button--properties nil nil t))

(Thanks, should have caught that button--properties was called by
unbuttonize-region too 🤦)

> But, now we don't know if the help-echo property was effectively added
> by the library or it was already there :-(.  Sadness.

Would the attached address that problem?  (To apply on top of the
previous patch; I'll squash it all if we are happy with it)