In https://sample-sheet.readthedocs.io/quick-start.html#defining-sample-read-structures you mention that > Adding an attribute with spaces must be done with the add_attr() method <img width="1294" height="438" alt="Image" src="https://github.com/user-attachments/assets/2f7dc585-e86a-426f-933a-bf1a140721ce" /> can we have an example, please?