Re: undo weirdness with insert-file-contents

[martin rudalics]

> > I define a "message-setup-hook" which for some reason has the unintended
> > side-effect of turning off undo in the result message-mode buffer
> > [buffer-undo-list has a value of t].
>
>
> Here's a simpler example of the same thing (?):

Thanks for noting.

> http://lists.gnu.org/archive/html/emacs-devel/2008-02/msg02302.html
>
>   From:   Bill Wohler
>   Subject:     23.0.60; Disabled undo
>   Date:        Sat, 23 Feb 2008 22:07:26 -0800

Bill, please try whether the attached patch works.

*** fileio.c.~1.602.~   Thu Feb 14 20:41:44 2008
--- fileio.c    Thu Feb 28 20:21:18 2008
***************
*** 4674,4680 ****
  
        /* Save old undo list and don't record undo for decoding. */
        old_undo = current_buffer->undo_list;
-       current_buffer->undo_list = Qt;
  
        if (NILP (replace))
        {
--- 4674,4679 ----