bug#2228: 23.0.90; rmail-cease-edit ignores changes to the message headers

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: 2228@emacsbugs.donarmstrong.com,  Eli Zaretskii <eliz@gnu.org>
> Date: Sun, 08 Feb 2009 15:43:04 -0500
> 
> Richard M Stallman wrote:
> 
> >     If one invokes rmail-edit, and edits the headers of the message, the
> >     changes to the headers are not copied back to the original message
> >     held in rmail-buffer.  The effect is that your edits of the headers
> >     are lost after you type "C-c C-c" to exit rmail-edit.
> >
> > I never got around to writing the code to copy header edits into the
> > original message.  Perhaps the easiest way to do it is to put the "old
> > version" into a buffer and compare the edited headers with the old
> > headers.
> 
> I think that editing a message should present the message with headers
> expanded. In which case I don't see why changing the header would be
> any different to changing the body.

Sounds like a good plan.  Would you like to give it a shot?