1. Summary should at least mean something. Upstream's "A small sphinx extension to add a "copy" button to code blocks." is not a bad one.
2. Some tests would be helpful. Upstream at least builds the package's documentation.
3. Use correct name of the package in `%description`.
4. It is never OK to include to `%files` whole `%{python_sitelib}/*`. Be more selective, please. It protects against future packaging mistakes.

superseded by 908881