sha1dc: use proper string functions on Python 2/3
PyString_FromStringAndSize doesn't exist on Python 3: we need
to use PyUnicode_FromStringAndSize.
The extension now compiles without warnings on Python 2 and 3.
Differential Revision: https://phab.mercurial-scm.org/D7878
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
| contrib/python-zstandard/
'''
skip-string-normalization = true
quiet = true