Hi, I've attached a patch fixing up this test. The difference occurred with:
rf"""\x12 S \n \u1234 \U00010348 \N{Plus-Minus Sign}"""
(and equivalent variants: the same string but starting with fr""", fr''', rf''').
The patch treats "{Plus-Minus Sign}" as an embedded _expression_ within an f-string, causing it to be fontified differently (previously it was fontified the same as the rest of the string). This is invalid syntax since "Plus-Minus Sign" is not a valid _expression_, so I think it's the correct behaviour since it emphasises that "{Plus-Minus Sign}" will be treated as an embedded _expression_ even though it's invalid.
I hope that makes sense, thanks, Laurence