style: fix formatting in test_run.py (black auto-format)

Author: Andrew Bruneel

tests/commands/server/test_run.py

@@ -736,7 +736,6 @@ def test_run_temporary_without_source_uses_fallback_name(self) -> None:
             mock_atexit.register.assert_called_once()
             mock_process.assert_called_once()
 
-
     def test_run_registration_with_streamable_http_only(self) -> None:
         """Test that registration uses /mcp endpoint when only streamable HTTP is enabled."""
         with (