Format files with Ruff (#17643)

I thought ruff check would also format, but it doesn't.

This runs ruff format in CI and dev scripts. The first commit is just a
run of `ruff format .` in the root directory.

.github/workflows/tests.yml

@@ -131,9 +131,12 @@ jobs:
         with:
           install-project: "false"
 
-      - name: Check style
+      - name: Run ruff check
         run: poetry run ruff check --output-format=github .
 
+      - name: Run ruff format
+        run: poetry run ruff format --check .
+
   lint-mypy:
     runs-on: ubuntu-latest
     name: Typechecking