Merge branch 'ci-black-fix' into 'master'

Ci black fix

See merge request noc/noc!4644

.gitlab-ci.yml

@@ -66,7 +66,7 @@ black:
     - >
       if [ ! -z "$FLIST" ];
       then
-        black --check $FLIST;
+        black --check --diff $FLIST;
       else
         echo "No files to lint"
         true;