style: format with black and fix ruff SIM117 warnings

- Merge nested with statements in test_project_root.py
- Reformat multi-line calls in test_cli.py and update.py

tests/test_cli.py

@@ -31,7 +31,10 @@ class TestCliHelp:
         runner = CliRunner()
         result = runner.invoke(cli, ["update", "--help"])
         assert result.exit_code == 0
-        assert "update" in result.output.lower() or "reinstall" in result.output.lower()
+        assert (
+            "update" in result.output.lower()
+            or "reinstall" in result.output.lower()
+        )
 
     def test_upgrade_alias_exists(self) -> None:
         """upgrade should be an alias for update."""
@@ -96,4 +99,3 @@ class TestCliDefaultBehavior:
             assert result.exit_code == 0
             call_args = mock_run.call_args[0][0]
             assert "--dangerously-skip-permissions" in call_args
-