bug#9520: 24.0.50; hide<->show feature of RMAIL's MIME handling is broken

[Eli Zaretskii]

> Date: Wed, 16 Nov 2011 05:40:10 -0500
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 9520@debbugs.gnu.org
> 
> > From: Glenn Morris <rgm@gnu.org>
> > cc: Eli Zaretskii <eliz@gnu.org>
> > Date: Tue, 15 Nov 2011 21:47:49 -0500
> > 
> > 
> > Bisected to this commit:
> > 
> > revno: 105643
> > committer: Eli Zaretskii <eliz@gnu.org>
> > branch nick: trunk
> > timestamp: Sat 2011-09-03 11:44:16 +0300
> > message:
> >   Fix display by Rmail of bidirectional text in MIME email messages.
> >   
> >    lisp/mail/rmailmm.el (rmail-mime-insert-tagline): Insert an extra
> >    newline before and after the tag line, so it doesn't interfere
> >    with determining the paragraph direction of bidirectional text.
> 
> Yes, I guessed that much ;-)
> 
> Since the above adds 2 extra newlines, some other code should remove
> them, or take them into consideration, but doesn't.  I will get to
> that in a couple of days, unless you beat me to it.

Fixed in revision 106426 on the trunk.