hardcoded-string-charset (FURB156) has a false positive with an incorrect fix. Given an expression of the form <expression> in <string literal>, the rule tries to replace the string literal with a variable from the string module, ignoring the order of the characters in the string literal. That is only valid when the left-hand-side expression is a string of length 1. If it is multiple characters, reordering the characters in the right-hand-side expression can change the value of the in operation.

$ ruff --version
ruff 0.7.0

$ cat furb156.py
print("89" in "9876543210")

$ python furb156.py
False

$ ruff check --isolated --preview --select FURB156 furb156.py --fix
Found 1 error (1 fixed, 0 remaining).

$ cat furb156.py
import string
print("89" in string.digits)

$ python furb156.py
True