python-ngram fails to build due to dependency on python2-sphinx.

python2-sphinx is no more, see https://fedoraproject.org/wiki/Changes/Sphinx2

Thi is blocking the rebuild for Python 3.8, see https://fedoraproject.org/wiki/Changes/Python3.8

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.8/fedora-rawhide-x86_64/00940766-python-ngram/

For all our attempts to build python-ngram with Python 3.8, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.8/package/python-ngram/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.8:
https://copr.fedorainfracloud.org/coprs/g/python/python3.8/

Let us know here if you have any questions.