reformat using black 26.x

Michael R. Crusoerequested to merge
crusoe/diffoscope:black26 into master

Please do a regular merge, and don't squash this MR. The commit ID for the reformating needs to not change, as it is mentioned in .git-blame-ignore-revs. Thanks!

Fixes: https://bugs.debian.org/1130073

Edited by Michael R. Crusoe

Merge request reports