Should not trigger on byte strings

[ghost]

The following code triggers an FS001 error:

a = 42
b"y=%d" % a

However, using an f-string with a byte string is a syntax error:

>>> bf"y={a}"

  File "<stdin>", line 1
    bf"y={a}"
      ^^^^^^^
SyntaxError: invalid syntax

(In this particular case f"y={a}".encode("utf-8") would work, but that's longer and doesn't always work correctly if there are byte literals in my string.)

[MichaelKim0407]

OK I can take a look. Should be relatively easy to change.

Can you please check what greedy level you are using? If you are using level 2 then it would report an error anyway.

[ghost]

I'm using whatever is the default.