RUF010 diagnostic is unhelpful for an interpolation with debug text

[dscorbett]

Summary

explicit-f-string-type-conversion (RUF010) should be suppressed for interpolations that use = because there is no way to use a conversion flag to get the same output, which the user presumably intended, so the diagnostic is not helpful.

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

$ python ruf010.py
ascii(1)='1'

$ ruff --isolated check ruf010.py --select RUF010 --output-format concise -q
ruf010.py:1:10: RUF010 Use explicit conversion flag

Alternatively, if the diagnostic is deemed helpful, I suggest reverting that piece of #18690 and marking the fix unsafe in this case. Either works; it’s just this middle ground of hinting at a change but not showing it that seems unhelpful.

Version

ruff 0.13.1 (706be0a 2025-09-18)

[ntBre]

Thank you! I agree that we should suppress the diagnostic in this case. We'll just need to check for debug text before creating the diagnostic instead of after.