Re: bug in message-message mode?

[Tassilo Horn]

Emanuel Berg via Users list for the GNU Emacs text editor 
<help-gnu-emacs@gnu.org> writes:

>>> The --- after the header is also a delimiter, but there it
>>> works. (See `rfc822-goto-eoh'.)
>>>
>>> There's no reason it should work on the
>>> signature delimiter.
>>>
>>> Or is there?
>>
>> I don't know. But it seems that this behavior is only there when the
>> text has both a `field' and `rear-nonsticky' property. You can
>> experiment with it in *stratch*:
>>
>> (insert "\n\n"
>>         (propertize "test" 'field 'foobar 'rear-nonsticky t)
>>         "\n")
>
> OK, I don't know what `rear-nonsticky' is supposed to denote but '--
> \n' isn't a field,

Well, somebody thought it would be a good idea to place a field property
on "-- " and I guess there were reasons.  Maybe one effect is that it
supresses whitespace cleanup (the trailing space is significant), and
paragraph filling.

> with the fields it makes sense to first go to the beginning of the
> field, then (as already) there go to the beginning of the line ...

Yes, that's controlled by `message-beginning-of-line'.

> But on the signature delimiter - and only at the last char -
> nothing happens at all.
>
> A bug maybe?

Maybe.  Or an nonintended side-effect.  If it bothers you, file a bug
report.

Bye,
Tassilo