chore(ruff): cleanup setup.py whitespace, comprehensions etc. Fixes: replace [f for f in ...] with list(...) replace else block after return in if true case use with open() when reading announcement.txt add trailing , in lists. whitespace normalizing

License
=======

Roundup is Free Software under the following license (from the file
COPYING.txt in the software distribution):

.. raw:: html

   <div class="file_insert">

.. include:: ../COPYING.txt

.. raw:: html

   </div>