bug#7587: 23.2; `format-mode-line' makes Emacs crash

[Eli Zaretskii]

> Date: Mon, 20 Dec 2010 20:33:22 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: michael_heerdegen@web.de, 7587@debbugs.gnu.org
> 
> > Less flippantly, the FACE argument, if non-nil, is still applied as a
> > text property to the returned string.
> 
> Which makes me wonder why we need to pass to init_iterator anything
> but DEFAULT_FACE_ID...
> 
> > So I don't think there's going to be any noticeable difference
> > (again, we don't have any concrete use cases, so it's difficult to
> > say).  The docstring change might not even be necessary.
> 
> If FACE is still applied, then the doc string change (and part of what
> I wrote in NEWS and the ELisp manual) should indeed be reverted.

Done.