Done via the following command: git diff fcd5dd259a1700a045be902b43391b0d1bd58a5b --stat --name-only | xargs sed -i '/Pleroma Authors/c# Copyright © 2017-2020 Pleroma Authors <https:\/\/pleroma.social\/>'
Done via the following command: git diff 1e6c102b --stat --name-only | cat - | xargs sed -i 's/2017-2018 Pleroma Authors/2017-2019 Pleroma Authors/'