docutils releas 0.18

done.

Some Of The Changes
==================

* Identifiers:

During identifier normalization
<https://docutils.sourceforge.io/docs/ref/rst/directives.html#identifier-normalization>,
leading number and hyphen characters are no longer stripped from a reference
name
<https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#reference-names>,
if the id_prefix
<https://docutils.sourceforge.io/docs/user/config.html#id-prefix> setting
is non-empty.
* HTML5:

Use the semantic tag <aside> for footnote text and citations, topics
(except abstract and toc), admonitions, and system messages. Use <nav> for
the Table of Contents.

Make "auto" table column widths the default:
* Major refactoring and fixes/additions in docutils/utils/math/math2html.py
and docutils/utils/math/latex2mathml.py

For details consult https://docutils.sourceforge.io/RELEASE-NOTES.html