revert-buffer doesn't retest used line endings and simply keeps using the originally loaded one

[Dirk Dierckx]

Details:
i have a text file with DOS (CR/LF) line endings, when opening it in emacs, 
emacs correctly detects the DOS line endings and saves of that buffer will 
contain DOS line endings, but ...
if i convert the file (using dos2unix for example) to unix line endings and 
afterwards do a revert-buffer in emacs it still assumes the file uses DOS line 
endings, if i save this buffer, it will be saved using DOS line endings 
(effectively undoing my dos2unix conversion)

Reproducible: Always
Steps to Reproduce:
see details

Actual Results:  
see details

Expected Results:  
revert-buffer should recheck the used line endings and don't assume the line
ending style didn't change


In GNU Emacs 21.3.50.1 (i686-pc-linux-gnu, GTK+ Version 2.4.9)
 of 2004-11-11 on hypercube
Distributor `Gentoo Linux (The X.Org Foundation 6.8.0, revision r1-0.2.2.1)', 
version 11.0.60800000
configured using `configure '--host=i686-pc-linux-gnu' '--prefix=/usr' 
'--libexecdir=/usr/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' 
'--enable-debug' '--with-x' '--with-xpm' '--with-jpeg' '--with-tiff' 
'--with-gif' '--with-png' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 
'CC=gcc' 'host_alias=i686-pc-linux-gnu''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  show-paren-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  global-font-lock-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<menu-bar> <help-menu> <report-emacs-bug>

Recent messages:
Loading emacsbug...done

pgpnQQ2UD2gmk.pgp
Description: PGP signature