Summary

The fix for explicit-f-string-type-conversion (RUF010) should be marked unsafe when it deletes a comment. Example:

$ cat >ruf010.py <<'# EOF'
f"{ascii(
    # comment
    1
)}"
# EOF

$ ruff --isolated check ruf010.py --select RUF010 --fix
Found 1 error (1 fixed, 0 remaining).

$ cat ruf010.py 
f"{1!a}"

When the modified code includes a comment and the comment is preserved, the fix should continue to be marked safe. Example:

f"{ascii((
    # comment
    1
))}"

Version

ruff 0.12.7 (c5ac998 2025-07-29)