From mboxrd@z Thu Jan  1 00:00:00 1970
From: azw@fastmail.fm (Albert Z. Wang)
Subject: Re: fill-paragraph: wrong behaviour after latex-environments
Date: Thu, 03 May 2012 11:05:10 -0400
Message-ID: <87zk9pe255.fsf@gmail.com>
References: <u13bkr4v1ifr3.fsf@majorana.uni-muenster.de>
Mime-Version: 1.0
Content-Type: text/plain
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([208.118.235.92]:50502)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1SPxaw-00007o-JD
	for emacs-orgmode@gnu.org; Thu, 03 May 2012 11:05:36 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1SPxau-0000Rw-GS
	for emacs-orgmode@gnu.org; Thu, 03 May 2012 11:05:26 -0400
Received: from plane.gmane.org ([80.91.229.3]:42844)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1SPxau-0000RZ-9N
	for emacs-orgmode@gnu.org; Thu, 03 May 2012 11:05:24 -0400
Received: from list by plane.gmane.org with local (Exim 4.69)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1SPxar-0007GT-1U
	for emacs-orgmode@gnu.org; Thu, 03 May 2012 17:05:21 +0200
Received: from c-24-61-131-59.hsd1.nh.comcast.net ([24.61.131.59])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <emacs-orgmode@gnu.org>; Thu, 03 May 2012 17:05:21 +0200
Received: from azw by c-24-61-131-59.hsd1.nh.comcast.net with local (Gmexim
	0.1 (Debian)) id 1AlnuQ-0007hv-00
	for <emacs-orgmode@gnu.org>; Thu, 03 May 2012 17:05:21 +0200
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: emacs-orgmode@gnu.org

Benjamin Motz <b.motz@uni-muenster.de> writes:

> Hi,
>
> invoking fill-paragraph on the following org-code will delete the
> newline after \end{equation}:
>
> The relation
> \begin{equation}
> E=mc^2
> \end{equation}
> won't be further discussed here.
>
> This behaviour is undesirable because it makes the org-text less
> readable. Also, when adding '%' after \end{equation}, newline is still
> being deleted by fill-paragraph (and the text after '%' won't be
> exported e.g. by latex-export).
>
> Is there a workaround or can someone point me to the location where I
> can fix/change this behaviour?
>
> Thanks, Benjamin

I had the same issue; fixed it by adding the following org-mode-hook:

(add-hook 'org-mode-hook 
	  (lambda ()
	    ;; don't rewrap display equations into paragraphs
	    (setq paragraph-separate 
		  (concat "[\\f \\t]*\\(\\\\begin{\\|\\\\end{\\|\\\\\\[\\|\\\\\\]\\)\\|"
			  paragraph-separate))
	    ))))

This sets several new paragraph boundary markers to prevent wrapping
them into paragraphs: \begin{, \end{, and the unnumbered display
equation shortcut \[, \].