style(tests): fix formatting in iterative bootstrap tests

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Rohan Devasthale <rdevasth@redhat.com>

Author: rd4398

tests/test_bootstrapper_iterative.py

@@ -307,9 +307,7 @@ def mock_cache(req: Requirement, version: Version) -> tuple:
         versions = {str(it.resolved_version) for it in result}
         assert versions == {"1.0", "3.0"}
 
-    def test_all_cached_keeps_highest_version(
-        self, tmp_context: WorkContext
-    ) -> None:
+    def test_all_cached_keeps_highest_version(self, tmp_context: WorkContext) -> None:
         """If all versions are cached, keeps the highest for dependency discovery."""
         bt = bootstrapper.Bootstrapper(tmp_context, multiple_versions=True)
         item = _make_resolve_item()