The fix for ISC001 changes behavior when the first string ends with a one- or two-digit octal escape sequence and the second begins with an octal digit.

$ ruff --version
ruff 0.6.0
$ cat isc001.py
print("\12""0")
$ python isc001.py

0
$ ruff check --isolated --select ISC001 isc001.py --fix
Found 1 error (1 fixed, 0 remaining).
$ python isc001.py
P

The least disruptive fix would be to detect this specific situation and pad the escape sequence to three digits. In the above example, that would result in "\0120".