Fix failing black test (#10697)

* Fix failing black test
2020-09-02 19:26:40 +01:00 · 2020-09-02 19:26:40 +01:00 · 02b853b75e
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@ -150,7 +150,7 @@ repos:
    hooks:
      - id: check-hooks-apply
  - repo: https://github.com/psf/black
-    rev: stable
+    rev: 19.10b0
    hooks:
      - id: black
        files: api_connexion/.*\.py|.*providers.*\.py