[Bug-AUCTeX] Behavior of LaTeX-fill-paragraph when use-hard-newlines

[Névine Ebeid]

I know I have an older version of AucTeX, which comes as part of
xemacs-sumo in the cygwin distribution. But I was comparing the
handling of use-hard-newlines in the functions in fill.el and the
analogous ones in latex.el (even in the newest package 11.85):

The effect that I wished to see is that when I use LaTeX mode and set
use-hard-lines, the hard lines would be kept between lines that belong
to the same paragraph. This effect exists when I edit a txt file in
the Text mode but not in LaTeX mode.

Thanks.

Emacs  : XEmacs 21.4 (patch 22) "Instant Classic" [Lucid]
(i686-pc-cygwin, Mule) of Sat Jan 31 2009 on vzell-de
Package: AUCTeX CVS-1.14 (2007-02-05)

current state:
==============
(setq
 window-system 'mswindows
 LaTeX-version "2e"
 TeX-style-path '("style/" "auto/"
"/usr/share/xemacs/xemacs-packages/etc/auctex/style/"
"/usr/share/xemacs/xemacs-packages/etc/auctex/auto/")
 TeX-auto-save t
 TeX-parse-self t
 TeX-master t
 )