url: pass str to pathname2url
This is needed to appease Python 3.
This fixes test-extdata.t and test-url-download.t on Python 3
on Windows.
Differential Revision: https://phab.mercurial-scm.org/D8335
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true