tests: add a --retest test to demonstrate a fix in next patch As you see above the added lines, there was only one test failed. So the output should be: "running 1 tests using 1 parallel processes" Next patch will be fixing this. Differential Revision: https://phab.mercurial-scm.org/D8964

[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true