How to reproduce:
1. Open the user’s attached “UITKTest.zip” project
2. Open the “CommonStyle.uss” file
3. Add a “/“ after the first “” and save the file
4. Focus the Editor

Expected result: No errors
Actual result: “USS parsing error: An unexpected error occurred” errors appear

Reproducible with: 2021.3.29f1, 2022.3.6f1, 2023.1.7f1, 2023.2.0b3

Reproduced on: macOS 13.4.1 (Intel)

Notes:
-reproducible one or more “/“ signs
-not reproducible if adding “/“ before the second “”