Hi Nasser,
I just updated to TL 2021 last night. I noticed the first thing when
compiling some existing latex file that now the vertical spacing
between enumeration list items is much larger than before. All other
things being the same.
Notice the difference. Now it puts the item in a <p></p>
while before it did not. This explains the extra vertical spacing.
I find the extra vertical spacing between the lines too large and like the
earlier
one little more.
The original output was buggy, as it didn't play well with \item that
cointained multiple paragraphs. So we start paragraph explicitly for
each \item now.
You can remove the spacing using the following configuration file:
\Preamble{xhtml}
\Css{li p:first-child{margin-bottom:0}}
\begin{document}
\EndPreamble
Best regards,
Michal