pycompat: fix a bytes vs str issue in `unnamedtempfile()` This seems trivially correct, though the only two uses I found both took this path. So I'm guessing we're missing test coverage. Differential Revision: https://phab.mercurial-scm.org/D10129

[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true