Nested quotation marks in f-string, ignores parse error

[andy-lz]

In Python 3.9.18, the below code will succeed silently with ruff format and ruff check, even though it has a SyntaxError:

# file.py
my_str = f"1+1={"2"}"


>> ruff format file.py #succeeds
>> python file.py  # fails with SyntaxError

[AlexWaygood]

Thanks for opening the issue! I'm going to close this as a duplicate of #6591 (the syntax in question here is legal on Python 3.12+, but not on lower versions)