test-revlog: update the patch used to test delta againts nullrev
We need to be careful to not create invalid delta for changelog. Changelog is
special because it does not use any delta in practice and don't use general
delta in its format.
Using the new patch will help use to test more cases.
[build-system]
requires = ["setuptools", "wheel"]
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true