py3: stop using util.iterfile() The Python 3 implementation is a no-op. So this is equivalent. We still keep util.iterfile() around for backwards API compatibility to help the Python 3 migration. It can be deleted in a future release. Differential Revision: https://phab.mercurial-scm.org/D12347

[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