[tex4ht] [bug #339] remove/rewrite braille code

[Karl Berry]

    what kind of system/code/workflow Antonis refers to as
    "Braille support in tex4ht"

Those were my words, not his.  He's referring to what tex4ht-html-speech
outputs -- some form of XML.  His actual words are below.

      "SuBrl: A LaTeX to braille converter"
    http://www.dotlessbraille.org/gurari.htm
    Does anybody know about source files?

No luck. I had thought that Ohio State sent me a complete dump of
Eitan's directories, but the string "subrl" does not appear there. I can
only surmise he was working on a laptop or another development machine
when he died, and I doubt there's any way to track it down now, seven
years later.  This (Braille/speech/whatever output) is what Eitan was
actively working on at the time.


Date: Mon, 17 Oct 2016 08:41:28 +0300
From: Antonis Tsolomitis
To: Karl Berry <karl at freefriends.org>
Subject: Re: latex2nemeth

[...] About Gurari. I am aware of tex4ht and actually have tried to make it
work because here in Greece we had a real case to take care of. A blind
student in the Math department.  But it depends on liblouis or other
library that converts from xml to braille. And this step fails
miserably; the braille output is incomprehensible.

I contacted then the developers of liblouis through the liblouis list
and their answer was that first they do not care about TeX (their target
is Office) and as to why it does not work they wrote to me that the xml
produced by tex4ht is not what is expected by liblouis to convert
correctly. [...]