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

[Glenn Morris]

Richard M Stallman wrote:

> It works fine for the usual job, editing the message body.

However, it has a clear bug, in that it silently discards any changes
made to the headers.

> Making it work for editing headers probably takes 200 lines of code.

(That's more code than exists in rmailedit.el in total at present.)

Me installing the 10 line fix I have for the above problem will not
make it any harder for someone to write those 200 lines in the future.
I will happily open the wishlist bug for that.