Comment (by Roland Haas):

Zach fixed the midpoint rule in git hash 42342282 "Multipole: Journey to fix midpoint integration begins." of einsteinanalysis as far as I know. Ticket #2398.

Yes to the other statements though.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2282/gallery-examples-use-low-order-integration