Summary

Taking this over from #8415:

I have a little snippet that inserts ipdb into code, and I want to keep it on a single line, so that I can easily remove it again with Vim dd, here is the test-case:

def main() -> None:
    import ipdb; ipdb.set_trace()  # noqa: E402,E702,I001 fmt: skip

This passes ruff's check alright:

% ruff --isolated check test.py --fix 
All checks passed!

But when I run the formatter on it, it seems that fmt: skip is being ignored:

% ruff --isolated format test.py --diff
--- test.py
+++ test.py
@@ -1,2 +1,4 @@
 def main() -> None:
-    import ipdb; ipdb.set_trace()  # noqa: E402 E702 I001 # fmt: skip
+    import ipdb
+
+    ipdb.set_trace()  # noqa: E402 E702 I001 # fmt: skip

1 file would be reformatted

I have tried # fmt: skip before and after the noqa filter, I have tried two spaces before the #, and I have tried without noqa, i.e. just # fmt: skip, with and without a space after the colon — the same result for each of these permutations.

If I enclose the line in fmt:off and fmt:on statements, then the formatter finds nothing to do, but that defies the purpose of the single-line import, and the per-line fmt:skip instruction.

Version

0.11.4