SIM905 diagnostic mentions `str.split` instead of `str.rsplit`

[dscorbett]

Summary

The diagnostic for split-static-string (SIM905) mentions str.split even when the relevant method is str.rsplit. Example:

$ cat >sim905.py <<'# EOF'
"a,b,c,d".rsplit(",")
# EOF

$ ruff --isolated check sim905.py --select SIM905 --output-format concise -q
sim905.py:1:1: SIM905 [*] Consider using a list literal instead of `str.split`

Version

ruff 0.13.0 (a1fdd66 2025-09-10)