apply python formatter

docker/update_test_dockers.py

@@ -11,7 +11,6 @@
 #   René Fritze    (2019)
 #   Tobias Leibner (2019 - 2020)
 # ~~~
-
 """
 Update docker images and templated scripts in dune-xt-*
 

scripts/make_env_file.py

@@ -18,7 +18,11 @@ from shlex import quote
 home = expanduser("~")
 
 prefixes = os.environ.get('ENV_PREFIXES', 'BUILD SYSTEM GITLAB CODECOV CI encrypt TOKEN TESTS').split(' ')
-blacklist = ['TRAVIS_COMMIT_MESSAGE', 'CI_COMMIT_MESSAGE', 'CI_COMMIT_DESCRIPTION', ]
+blacklist = [
+    'TRAVIS_COMMIT_MESSAGE',
+    'CI_COMMIT_MESSAGE',
+    'CI_COMMIT_DESCRIPTION',
+]
 env_file = os.environ.get('DOCKER_ENVFILE', os.path.join(home, 'env'))
 with open(env_file, 'wt') as env:
     for k, v in os.environ.items():