packaging: make dockerrpm fedora target more generic
Fedora moves fast in version numbers, and often with Mercurial packaging being
backwards compatible. Thus, only aim for providing built-in support for latest
Fedora version, and make it easy to update.
With this refactoring, 'dockerrpm fedora31' also works.
'dockerrpm fedora' will use the 'fedora:latest' Docker image.
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
| hgext/fsmonitor/pywatchman/
| contrib/python-zstandard/
'''
skip-string-normalization = true
quiet = true