diff -r 45ec64d93b3a -r 5e84a96d865b black.toml
--- a/black.toml	Tue Jan 21 15:45:06 2020 -0800
+++ b/black.toml	Wed Jan 22 22:23:04 2020 -0800
@@ -9,7 +9,6 @@
 | \.mypy_cache/
 | \.venv/
 | mercurial/thirdparty/
-| contrib/python-zstandard/
 '''
 skip-string-normalization = true
 quiet = true