bug#24305: 25.1; dired can't replace '\n' in file content (dired-do-find-regexp-and-replace)

[Max Canal]

In GNU Emacs 25.1.2 (x86_64-unknown-linux-gnu)
 of 2016-08-15 built on blackbox
Repository revision: 8d681476bd44a2f843030579a5bbf5a248488afb
System Description:     Trisquel GNU/Linux 7.0, Belenos

Configured using:
 'configure --without-sound --without-x --without-xpm --without-jpeg
 --without-png --without-rsvg --without-imagemagick --without-tiff
 --without-gif'

Configured features:
GPM DBUS NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 ZLIB

Important settings:
  value of $LC_MONETARY: fr_FR.UTF-8
  value of $LC_NUMERIC: fr_FR.UTF-8
  value of $LC_TIME: fr_FR.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Dired by name

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-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
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message format-spec rfc822 mml mml-sec
password-cache epg epg-config gnus-util mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047
rfc2045 ietf-drums mm-util help-fns help-mode easymenu cl-loaddefs pcase
cl-lib mail-prsvr mail-utils regexp-opt dired term/xterm xterm time-date
mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type tabulated-list newcomment elisp-mode lisp-mode prog-mode
register page menu-bar rfn-eshadow timer select mouse jit-lock font-lock
syntax facemenu font-core frame cl-generic cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese charscript case-table epa-hook jka-cmpr-hook help
simple abbrev minibuffer cl-preloaded nadvice loaddefs button faces
cus-face macroexp files text-properties overlay sha1 md5 base64 format
env code-pages mule custom widget hashtable-print-readable backquote
dbusbind inotify multi-tty make-network-process emacs)

Memory information:
((conses 16 87307 7050)
 (symbols 48 18871 0)
 (miscs 40 46 88)
 (strings 32 14467 4505)
 (string-bytes 1 413195)
 (vectors 16 9723)
 (vector-slots 8 380240 16732)
 (floats 8 148 265)
 (intervals 56 317 0)
 (buffers 976 20)
 (heap 1024 34761 640))




Description:
Trying to replace '\n' (inserted with C-q C-j) in Dired mode with Q
(dired-do-find-regexp-and-replace) does not work anymore. 
This was tested in v25.1.2 (rc2) with -Q flag

Good luck with that, let me know if you need more infos! :)