diff -r 9bfd083bc6ee -r 929678eb4cbd pyproject.toml
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pyproject.toml	Sun Oct 06 09:35:14 2019 -0400
@@ -0,0 +1,3 @@
+[tool.black]
+line-length = 80
+exclude = 'build/|wheelhouse/|dist/|packages/|\.hg/|\.mypy_cache/|\.venv/|mercurial/thirdparty/|hgext/fsmonitor/pywatchman/|contrib/python-zstandard/'