RUF065 should ignore str when not used for conversion #21315
Description
Summary
logging-eager-conversion (RUF065) should only treat str as an unnecessary conversion when it has exactly one argument and that argument isn’t starred. Otherwise, the str call is doing something else and can’t be so straightforwardly removed. Example:
$ cat >ruf065.py <<'# EOF'
import logging
logging.warning("%s", str())
logging.warning("%s", str(b"\xe2\x9a\xa0", "utf-8"))
logging.warning("%s", str(*(b"\xf0\x9f\x9a\xa7", "utf-8")))
logging.warning("%s", str(**{"object": b"\xf0\x9f\x9a\xa8", "encoding": "utf-8"}))
# EOF
$ ruff --isolated check ruf065.py --select RUF065 --preview --output-format concise -q
ruf065.py:2:23: RUF065 Unnecessary `str()` conversion when formatting with `%s`
ruf065.py:3:23: RUF065 Unnecessary `str()` conversion when formatting with `%s`
ruf065.py:4:23: RUF065 Unnecessary `str()` conversion when formatting with `%s`
ruf065.py:5:23: RUF065 Unnecessary `str()` conversion when formatting with `%s`Version
ruff 0.14.4 (c7ff982 2025-11-06)