Fix Version/s: None
The setup.cfg file is correct for flake8, but not for the flake8 extension of pytest. This apparently causes building meas_astrom to fail on my Mac, but not on lsst-dev.
More generally, it would be good if there were a way to insist the flake8 exclusions were identical to the pytest flake8 exclusions to prevent this kind of problem. That's outside the scope of this quick fix ticket, however.
Would you please review this small change, Russell Owen?