PLW1514 doesn’t recognize `encoding` positional argument of `codecs.open`

[dscorbett]

Summary

unspecified-encoding (PLW1514) fails to recognize the encoding parameter of codecs.open when the argument is passed positionally. encoding is at a different position in codecs.open than in open.

$ cat >plw1514.py <<'# EOF'
import codecs
codecs.open("plw1514.py", "r", "utf-8").close()
# EOF

$ python plw1514.py

$ ruff --isolated check plw1514.py --preview --select PLW1514 --unsafe-fixes --fix
Found 1 error (1 fixed, 0 remaining).

$ cat plw1514.py
import codecs
codecs.open("plw1514.py", "r", "utf-8", encoding="utf-8").close()

$ python plw1514.py
Traceback (most recent call last):
  File "plw1514.py", line 2, in <module>
    codecs.open("plw1514.py", "r", "utf-8", encoding="utf-8").close()
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: open() got multiple values for argument 'encoding'

Version

ruff 0.11.9 (2370297 2025-05-09)