How to reproduce:
1. Create a new Unity project
2. Create and open any UXML (UI Document) in the UI Builder
3. Add a VisualElement to the Hierarchy and select it
4. Set any inline style property in the Inspector
5. Right-click the inline style -> Extract Inlined Style to Selector -> create a new class
6. Open the new selector in the IDE
7. Close the file in the IDE without making any changes
Expected results: The IDE closes the file without prompting to save, since no changes were made
Actual results: The IDE prompts to save the file even though nothing was changed
Reproducible with: 6000.3.25f1, 6000.6.2f1, 6000.7.0b1
Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested