Additional errors appearing when running on one file

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A very specific circular import can cause the reported error to be reported differently, and the error deduplicator is affected:

1. run on specific file mypy test.py:

• expression contains Any "Untyped"
• expression contains Any "Any (unannotated)"

2. run on whole project mypy .:

• expression contains Any "Untyped"
• expression contains Any "Untyped" (removed by deduplicator)

this is especially an issue in IDEs that run mypy against a single file

TODO: insert egg