Turn off pre-commit's automatic parallelization for black (#675)

black internally uses multiprocessing for speed. In pre-commit 1.13.0 this is automated by the framework itself however if both pre-commit and black are forking processes this is slower and hits race-conditions in `black`.
2019-01-18 12:52:56 -08:00 · 2019-01-18 12:52:56 -08:00 · bc7e5c949f
commit bc7e5c949f
parent 7546ed292c
1 changed files with 1 additions and 0 deletions
--- a/.pre-commit-hooks.yaml
+++ b/.pre-commit-hooks.yaml
@ -4,4 +4,5 @@
    entry: black
    language: python
    language_version: python3
+    require_serial: true
    types: [python]