Apply Black formatting to test_executor.py

Fix Black linting failure caused by recent Windows compatibility changes.
Applied automatic formatting to tests/test_executor.py to ensure
GitHub Actions linting passes.

No functional changes - only code style formatting.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: jeremymanning

tests/test_executor.py

@@ -448,7 +448,7 @@ def test_get_result_success(self, executor):
         # Mock SFTP get to write test result when called
         import tempfile
         import os
-        
+
         def mock_get(remote_path, local_path):
             # Create the directory if it doesn't exist (Windows compatibility)
             os.makedirs(os.path.dirname(local_path), exist_ok=True)