color of comments with \ at this end

[Olivier Ricou]

This bug report will be sent to the Free Software Foundation,
 not to your local site managers!!
Please write in English, because the Emacs maintainers do not have
translators to read other languages for them.

In GNU Emacs 20.7.2 (i386-debian-linux-gnu, X toolkit)
 of Thu Apr  4 2002 on cyberhq modified by Debian
configured using `configure  i386-debian-linux-gnu --prefix=/usr 
--sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib 
--infodir=/usr/share/info --mandir=/usr/share/man --with-pop=yes --with-x=yes 
--with-x-toolkit=yes'

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

====================================

A comment line finished with a \ continues on the next
line (at least make and c++ understand it this way). So it
would be nice that emacs colorize all the comment line and
not only the one starting the # or //

exemple for makefile :

# this is a comment \
this is also a comment
but this is not a comment

with my version of emacs, only the first line is in red
====================================

Recent input:
right up up down left left up up up down down down 
down down up up up up up left right right right right 
right right down left left left left down down down 
up J x left x C-x C-s up up up up 0 x down i # escape 
down . C-x C-s x up x up d d C-x C-s P i # SPC escape 
C-l C-x C-s d d C-x C-s u C-x C-s down-mouse-1 mouse-1 
d d u $ x C-x C-s u C-x C-s C-l C-l down M-x r e p 
tab down-mouse-2 mouse-2

Recent messages:
highlighting 5: ^[_A-Za-z0-9]+[         ]*+?=
highlighting 4: \( \|:=\)[_A-Za-z0-9]+[         ]*\+=
highlighting 3: \$\([^  
{(]\|[{(]@?[_A-Za-z0-9:.,%/=]+[)}]\)
highlighting 2: ^[A-Za-z0-9.,/_-]+[     ]*:.*$
highlighting 1: ^include 

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