Log Message:
py-docutils: update to 0.20.

Release 0.20 (2023-05-09)
=========================

* General

  - Docutils 0.20 is the last version supporting Python 3.7 and 3.8.
  - Support Python 3.11 (patch #198 by Hugo van Kemenade).

* docutils/core.py

  - New functions `rst2…()` for use as "console_scripts" `entry points`_.
    (cf. `Future changes` in the RELEASE-NOTES_).

* docutils/frontend.py

  - New configuration setting "output_". Obsoletes the \ 
``<destination>``
    positional argument (cf. `Future changes` in the RELEASE-NOTES_).

* docutils/languages/
  docutils/parsers/rst/languages/

  - Support Ukrainian. Patch by Dmytro Kazanzhy.

* docutils/nodes.py

  - Fix `previous_sibling()` method that led to invalid HTML in some cases
    (cf. patch #195).
  - Fix bug #463. Spurious comma in deprecation warning.

* docutils/parsers/recommonmark_wrapper.py

  - Improved mock Sphinx module.

* docutils/transforms/__init__.py

  - `Transformer.populate_from_components()` now silently ignores
    components that are not instances of `docutils.TransformSpec`.

* docutils/transforms/frontmatter.py

  - Accept author names with initials like ``A. Einstein`` in the "author"
    `bibliographic field`_ instead of rising an error
    (generally, such names are `parsed as enumerated list`__).

    .. _bibliographic field:
        docs/ref/rst/restructuredtext.html#bibliographic-fields
    __ docs/ref/rst/restructuredtext.html#enumerated-lists

* docutils/transforms/references.py

  - `DanglingReferences` ignores `citation_reference` nodes if the
    "use_bibex" setting is active. (In this case, citations are provided
    by LaTeX/BibTeX.) Fixes bug #384.

* docutils/utils/__init__.py

  - New utility function `xml_declaration()`.
  - `DependencyList.add()` accepts `pathlib.Path` instances.
  - `find_file_in_dirs()` now returns a POSIX path also on Windows;
    `get_stylesheet_list()` no longer converts ``\`` to ``/``.

* docutils/utils/math/latex2mathml.py

  - Support "mod" notation for modulo operation / modulus arithmetic.

* docutils/utils/math/tex2mathml_extern.py

  - Support `Pandoc` as alternative LaTeX to MathML converter.
    Patch by Ximin Luo.

* docutils/writers/_html_base.py

  - Refactoring of `HTMLTranslator` initialization and collecting of
    document "parts". Adapt HTML writers importing `_html_base`.

    Changes to the HTML output (no space character before closing tag of
    XML declaration, order of metadata elements)
    don't affect the HTML semantics, styling, and rendering.

  - Wrap definition lists with "details" class argument in a <div>
    with the "id" and "class" values of the list node.

  - Use dpub-ARIA role "doc-footnote__" (instead of ARIA role \ 
"note")
    for footnotes.

    __ https://www.w3.org/TR/dpub-aria-1.1/#doc-footnote

* docutils/writers/latex2e/__init__.py

  - Do not load the `inputenc` package in UTF-8 encoded LaTeX sources.
    (UTF-8 is the default encoding for LaTeX2e since 2018).
  - Fix behaviour of the use_bibtex_ setting.
  - Outsource parts of `depart_document()` to new auxiliary methods
    `make_title()` and `append_bibliography()`.
  - Ensure POSIX paths in stylesheet loading macros.

* docutils/writers/latex2e/titlepage.tex

  - Drop ``\usepackage{fixltx2e}`` from template.
    (Obsolete since 2015 and dropped from other templates in Docutils 0.14.)

* docutils/writers/manpage.py

  - Do not output empty "manual" in ``.TH``.

* docutils/writers/xetex/__init__.py

  - Ignore settings in the [latex2e writer] configuration file section.
    Place common settings in section [latex writers].

* setup.py

  - Fix SetuptoolsDeprecationWarning: ``Installing '' as data is deprecated``
    by adding data directories to package_data.packages list.

* tox.ini

  - Extracted flake8 configuration and moved to ``.flake8``.
  - changedir to directory ``test`` to avoid path problems.

* test/

  - Refactored tests to use common `unittest` idioms.
    Fixes errors when running the test suite with ``python -m unittest``
    or external test frameworks, such as Pytest_.

  .. _pytest: https://pypi.org/project/pytest/

* test/coverage.sh

  - Removed. Use the coverage.py_ project instead,
    ``coverage run test/alltests.py`` and ``coverage report``.

  .. _coverage.py: https://pypi.org/project/coverage/

* tools/

  - Moved ``quicktest.py`` to ``tools/dev/``.