message: lint: Run mypy with --show-error-codes
  When using mypy ignore directives, the error code needs to be specified.
  Somehow mypy doesn't print it by default...
diff: @@ -102,7 +102,7 @@ if ! PYTHONWARNINGS="ignore" flake8 --ignore=B,C,E,F,I,N,W --select=$(IFS=","; e
  EXIT_CODE=1
  fi
  -if ! mypy --ignore-missing-imports $(git ls-files "test/functional/*.py" "contrib/devtools/*.py"); then
  +if ! mypy --ignore-missing-imports --show-error-codes $(git ls-files "test/functional/*.py" "contrib/devtools/*.py"); then
  EXIT_CODE=1
  fi
  