The Racket repository
rfindler improve the redundancy checking for class contracts
In particular, when there isn't any redundancy detected, then
just make a single call into the projection and create just a single

This seems to help on at least one of the configurations of
dungeon, which completes in about 6 minutes with this commit
and I gave up waiting after 15 minutes for the version of
racket that didn't have it
Latest commit 8cee5a0 Nov 21, 2018

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