Add --diff flag to black formatter check

This makes the output more explicit. Check this for details: https://github.com/psf/black#command-line-options
2020-11-03 22:31:04 +01:00
1 changed files with 1 additions and 1 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -25,4 +25,4 @@ jobs:
  include:
    - python: 3.8
      install: pip install -U black
-      script: black --check .
+      script: black --diff --check .