phab-refresh: add an explanatory message
This serve two purposes:
- clarify why a bot just touched this diff,
- explicit the fact the tests have been run, and are passing on this version.
Differential Revision: https://phab.mercurial-scm.org/D9527
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true