bug#37515: 27.0.50; button.el doesn't support help-echo function

[Basil L. Contovounesios]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> "Basil L. Contovounesios" <contovob@tcd.ie> writes:
>
>> Some further changes are needed to fully support the help-echo property.
>> Firstly, help-echo functions expect an overlay as their second argument
>> when the object that had the property is an overlay (button).  Secondly,
>> help-echo values can be forms in addition to strings and functions.
>> Lastly, (info "(elisp) Button Properties") needs updating to reflect the
>> supported values of the help-echo button property.
>>
>> The following patch should do all this.  I will push it in the next few
>> days if there are no objections.  WDYT?
>
> Looks good to me.

Thanks!  (The updated patch I just sent merely extends the tests.)

-- 
Basil