groff -Thtml bug

[Andries.Brouwer]

For the input file

===== Demo =====
.EQ
delim $$
.EN
.TL
Chain calculus in the geometries of types $A sub n$, $D sub n$, $E sub 6$,
$E sub 7$, $E sub 8$

.NH
A. Existence of chains
.LP
We shall talk about chains $x sub 0 * x sub 1 * ... * x sub l$
(in some residually connected Buekenhout-Tits geometry satisfying
a given diagram)
================

the command
% groff -e -ms Demo > Demo.ps
produces reasonable output.

But
% groff -e -ms -Thtml Demo > Demo.html
produces broken output, with the comma's in the title misplaced,
and the formula images misplaced:
...
<!-- Creator     : groff version 1.18.1.1 -->
...
<h1 align=center>Chain calculus in the geometries of types , <img 
src="grohtml-1956-1.png"></h1>
<a href="#1. A. Existence of chains">1. A. Existence of chains</a><br>

<hr>

<p><i><img src="grohtml-1956-2.png"></i> <b>,
,<img src="grohtml-1956-3.png">
,<img src="grohtml-1956-4.png">
<img src="grohtml-1956-5.png"></b></p>
...

[Yes, an old groff, maybe this was fixed already.]

Andries