This is related to the preview request suggestion. When a field is changed add a visual indicator that there is a change. This has two uses:
- When I edit a page I often have a mental checklist of changes to make. If I want to make three changes I can scroll over the page before I submit and ensure I didn't forget one of the three.
- I've been known to accidentally click in the wrong field and leave spare characters (partially due to a bad trackpad on one computer). I can review and verify there are no changes I didn't intend to make.