GNU bug report logs - #5821
bug in TeX mode

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "Dan Stratila" <dstrat <at> rci.rutgers.edu>
To: <bug-gnu-emacs <at> gnu.org>
Subject: bug in TeX mode
Date: Fri, 2 Apr 2010 01:01:25 -0400

Hello,

The TeX mode introduces a new bug in Emacs 23.1 that was not present in
22.3. This bug is not present when using AUCTeX - I am referring to the TeX
mode that comes with Emacs.

Specifically, when I want to manually re-fill a paragraph that has an empty
comment line right before it, the first line of the paragraph is "bumped up"
into the comment line. This "breaks" the document, since of course comment
lines do not appear in the document LaTeX produces. Here is an example:

===
%
Aaa aaa bbb bbb. Aaa aaa bbb bbb. Aaa aaa bbb bbb. Aaa aaa bbb bbb. 
Aaa aaa bbb bbb. Aaa aaa bbb bbb. Aaa aaa bbb bbb. 
===

Placing the cursor on a sentence and then manually re-filling triggers the
bug. It seems to be introduced by a change on line 1052 (of the new
list/textmodes/tex-mode.el). The new line says:

===
  (setq paragraph-separate
	(concat "[\f]\\|[ \t]*\\($\\|"
		"\\\\[][]\\|"
===

The old line (which had a different number) used to say

===
  (setq paragraph-separate
	(concat "[\f%]\\|[ \t]*\\($\\|"
		"\\\\[][]\\|"
===

Reverting just this line to the old one fixes the problem.

Thanks,
Dan

Message #8 received at 5821 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Stefan Monnier  <monnier <at> iro.umontreal.ca>
Cc: 5821 <at> debbugs.gnu.org, Dan Stratila <dstrat <at> rci.rutgers.edu>
Subject: Re: bug in TeX mode
Date: Sat, 03 Apr 2010 19:46:50 -0400

> ===
> %
> Aaa aaa bbb bbb. Aaa aaa bbb bbb. Aaa aaa bbb bbb. Aaa aaa bbb bbb.
> Aaa aaa bbb bbb. Aaa aaa bbb bbb. Aaa aaa bbb bbb.
> ===
>
> Placing the cursor on a sentence and then manually re-filling triggers the
> bug.

This seems to have been done deliberately.  Stefan, could you check your
change?


  2008-03-03  Stefan Monnier  <monnier <at> iro.umontreal.ca>

    * textmodes/tex-mode.el (latex-mode): Remove % from paragraph-separate
    so that M-q can fill comments.

Message #11 received at 5821 <at> debbugs.gnu.org (full text, mbox):

From: "Dan Stratila" <dstrat <at> rci.rutgers.edu>
To: "'Chong Yidong'" <cyd <at> stupidchicken.com>,
	"'Stefan Monnier'" <monnier <at> iro.umontreal.ca>
Cc: 5821 <at> debbugs.gnu.org
Subject: RE: bug in TeX mode
Date: Sat, 3 Apr 2010 20:44:23 -0400

M-q does fill comments without the change. It just doesn't mix them with
non-comment text (which is probably what you want anyway). 


> -----Original Message-----
> From: Chong Yidong [mailto:cyd <at> stupidchicken.com] 
> Sent: Saturday, April 03, 2010 7:47 PM
> To: Stefan Monnier
> Cc: Dan Stratila; 5821 <at> debbugs.gnu.org
> Subject: Re: bug in TeX mode
> 
> > ===
> > %
> > Aaa aaa bbb bbb. Aaa aaa bbb bbb. Aaa aaa bbb bbb. Aaa aaa bbb bbb.
> > Aaa aaa bbb bbb. Aaa aaa bbb bbb. Aaa aaa bbb bbb.
> > ===
> >
> > Placing the cursor on a sentence and then manually 
> re-filling triggers the
> > bug.
> 
> This seems to have been done deliberately.  Stefan, could you 
> check your
> change?
> 
> 
>   2008-03-03  Stefan Monnier  <monnier <at> iro.umontreal.ca>
> 
>     * textmodes/tex-mode.el (latex-mode): Remove % from 
> paragraph-separate
>     so that M-q can fill comments.

Message #14 received at 5821 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Chong Yidong <cyd <at> stupidchicken.com>
Cc: 5821 <at> debbugs.gnu.org, Dan Stratila <dstrat <at> rci.rutgers.edu>
Subject: Re: bug in TeX mode
Date: Sun, 04 Apr 2010 10:37:22 -0400

> This seems to have been done deliberately.  Stefan, could you check your
> change?

>   2008-03-03  Stefan Monnier  <monnier <at> iro.umontreal.ca>
>     * textmodes/tex-mode.el (latex-mode): Remove % from paragraph-separate
>     so that M-q can fill comments.

It looks like this commit was mistaken: the problem it introduces is
too serious.  Please revert it if you get to it before I do,


        Stefan

Message #17 received at 5821 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 5821 <at> debbugs.gnu.org, Dan Stratila <dstrat <at> rci.rutgers.edu>
Subject: Re: bug in TeX mode
Date: Tue, 06 Apr 2010 11:43:42 -0400

> > This seems to have been done deliberately.  Stefan, could you check your
> > change?
>
> >   2008-03-03  Stefan Monnier  <monnier <at> iro.umontreal.ca>
> >     * textmodes/tex-mode.el (latex-mode): Remove % from paragraph-separate
> >     so that M-q can fill comments.
>
> It looks like this commit was mistaken: the problem it introduces is
> too serious.  Please revert it if you get to it before I do,

Done.

Message #22 received at 5821 <at> debbugs.gnu.org (full text, mbox):

From: "Dan Stratila" <dstrat <at> rci.rutgers.edu>
To: "'Chong Yidong'" <cyd <at> stupidchicken.com>,
	"'Stefan Monnier'" <monnier <at> iro.umontreal.ca>
Cc: 5821 <at> debbugs.gnu.org
Subject: RE: bug in TeX mode
Date: Thu, 8 Apr 2010 21:56:42 -0400

Great, thanks!
 

> -----Original Message-----
> From: Chong Yidong [mailto:cyd <at> stupidchicken.com] 
> Sent: Tuesday, April 06, 2010 11:44 AM
> To: Stefan Monnier
> Cc: 5821 <at> debbugs.gnu.org; Dan Stratila
> Subject: Re: bug in TeX mode
> 
> > > This seems to have been done deliberately.  Stefan, could 
> you check your
> > > change?
> >
> > >   2008-03-03  Stefan Monnier  <monnier <at> iro.umontreal.ca>
> > >     * textmodes/tex-mode.el (latex-mode): Remove % from 
> paragraph-separate
> > >     so that M-q can fill comments.
> >
> > It looks like this commit was mistaken: the problem it introduces is
> > too serious.  Please revert it if you get to it before I do,
> 
> Done.

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