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bug#13772: 24.3.50; dired-diff does not replace dired-backup-diff

From: Richard Stallman
Subject: bug#13772: 24.3.50; dired-diff does not replace dired-backup-diff
Date: Wed, 20 Feb 2013 16:35:52 -0500

The M-= binding for dired-backup-diff was deleted,
supposedly because dired-diff now replaces it.
However, it does not.  If you type it on a backup file,
it does not present the current file as the default argument.
The default argument gives an error.

And if you specify the current file as the argument, you get a diff
between the right two files, but it is in reverse order.

In GNU Emacs (mips64el-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2013-02-02 on chiefs-gnewsense
Bzr revision: 111655 address@hidden
System Description:     Debian GNU/Linux 6.0.6 (squeeze)

Configured using:
 `configure CFLAGS=-O0 -g --with-gif=no --with-tiff=no --no-create

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Diff

Minor modes in effect:
  diff-auto-refine-mode: t
  shell-dirtrack-mode: t
  gpm-mouse-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
C-p C-x 4 b r f c 8 TAB RET C-s # i f SPC 0 C-s C-s 
C-s C-a C-s C-s C-s C-s C-s C-a C-k C-k C-n C-k C-k 
C-x o ESC v ESC v ESC v C-v C-n C-n C-n C-@ C-u C-n 
ESC w C-x o C-n C-n C-n C-y C-@ C-g C-u C-p C-d C-d 
C-n C-d C-d C-n C-d C-d C-n C-d C-d C-n C-@ C-u C-n 
C-n C-n C-n C-n C-n C-n C-w C-x o C-v C-v ESC v C-x 
o C-x 1 C-v C-u C-p C-u C-n C-n C-n C-k C-k C-p C-p 
C-p C-e SPC { C-a C-n C-n C-n C-@ C-u C-n C-u C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-u 2 C-x TAB C-o } 
ESC C-p ESC C-n SPC e l s e SPC { RET TAB b r e a k 
; RET } C-x C-s C-x b m b o x . c RET C-x b RET C-x 
b m a i r TAB TAB - TAB RET = C-g C-n C-p = C-g = ESC 
n . TAB 1 TAB RET C-x 0 C-v C-u C-v C-u C-v C-u C-v 
C-u C-v C-u C-v C-u C-v C-u C-v C-u C-v C-u C-v C-u 
C-v C-u C-v C-x b RET C-x b r f c TAB RET C-n C-n C-a 
C-k C-k C-v C-x C-s C-x b o u t g TAB RET g C-x b f 
DEL r f c TAB RET C-x b m a i r TAB - TAB RET C-n = 
RET = ESC n DEL DEL DEL DEL RET C-x 0 C-v ESC x r e 
p o r t SPC e m a v s DEL DEL s SPC DEL c s SPC b u 

Recent messages:
Mark activated
Mark set
Saving file /home/rms/mairix-0.23/rfc822.c...
Wrote /home/rms/mairix-0.23/rfc822.c
Making completion list...
Quit [2 times]
Saving file /home/rms/mairix-0.23/rfc822.c...
Wrote /home/rms/mairix-0.23/rfc822.c
dired-diff: Attempt to compare the file to itself

Load-path shadows:
None found.

(shadow emacsbug bug-reference diff cc-langs cl cl-lib cc-mode
cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine
cc-vars cc-defs dired-aux mule-util cal-move cal-menu calendar
cal-loaddefs log-edit pcvs-util add-log diff-mode easy-mmode vc
vc-dispatcher rmailsum rect parse-time vc-cvs sgml-mode gnus-util
mailcap find-func vc-bzr jka-compr rmailout dabbrev shell pcomplete
grep compile comint ansi-color ring misearch multi-isearch quail
help-mode mailalias qp rmailmm message sendmail format-spec rfc822 mml
easymenu mml-sec mm-decode mm-bodies mm-encode mailabbrev gmm-utils
mailheader mail-parse rfc2231 dired t-mouse time-date rmailedit rmail
rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils paren
cus-start cus-load nadvice advice help-fns tooltip ediff-hook vc-hooks
lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment lisp-mode register page
menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core frame cham georgian utf-8-lang misc-lang
vietnamese tibetan thai tai-viet lao korean japanese hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process dbusbind
inotify dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty emacs)

Dr Richard Stallman
President, Free Software Foundation
51 Franklin St
Boston MA 02110
www.fsf.org  www.gnu.org
Skype: No way! That's nonfree (freedom-denying) software.
  Use Ekiga or an ordinary phone call

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