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Summary
References astral-sh#970.
Implements
dict-iter-missing-items
.Took the tests from "upstream" here.
I wasn't able to implement code for one false positive, but it is pretty estoric: pylint-dev/pylint#3283
I would personally argue that adding this check as preview rule without supporting this specific use case is fine. I did add a "test" for it.
Test Plan
Followed the Contributing guide to create tests, hopefully I didn't miss any.