help: properly document the default pattern
The default isn't to glob. It's relpath, which does no globbing at
all. Thus most commands and options like -X/-I and hg files require
`glob:` in front of them to actually do any globbing.
I think long ago the default was to glob, but that hasn't been true
for a long time.
[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