From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Maus <dmaus@ictsoc.de>
Subject: Re: Incorrect hexification in URLs in LaTeX Export
Date: Sun, 25 May 2014 09:09:50 +0200
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To: Bastien <bzg@gnu.org>
Cc: "R. Michael Weylandt <michael.weylandt@gmail.com>" <michael.weylandt@gmail.com>, David Maus <maus.david@gmail.com>, Andreas Leha <andreas.leha@med.uni-goettingen.de>, "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>

Hi all,

At Sun, 25 May 2014 07:56:15 +0200,
Bastien wrote:
> 
> Hi Michael,
> 
> "R. Michael Weylandt <michael.weylandt@gmail.com>"
> <michael.weylandt@gmail.com> writes:
> 
> > TLDR: remove ?\= from org-link-escape-chars.
> 
> Done (in master.)
> 
> I'm copying David since he's the author of this commit:
> http://orgmode.org/w/?p=org-mode.git;a=commitdiff;h=1a68b6
> 
> David, sorry to jump in, but are there any reason why the
> characters + ; and = where escaped in this commit?
> 

I think the only reason was that these characters already had been
escaped in `org-link-escape-chars'.

The commit removed the special rules for the letters with
diacritics. The previous commit (0c4bb0e) introduced an algorithm that
covered non-ASCII characters in general, thus special rules for
letters with diacritics where no longer necessary.

I can only speculate why they were escaped in the first place: + ; and
= do have special meaning in HTTP URIs and IIRC Org did not draw a
strict distinction between escaping for internal purposes and escaping
of HTTP URIs.

Best,
  -- David

> Thanks in advance,
> 
> -- 
>  Bastien