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

[Glenn Morris]

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.