Reported by in #clojure-spec:
The current spec conforms function bodies with single maps as prepost conditions rather than function bodies, after the patch:
Patch: 0001-CLJ-2144-conform-map-fn-bodies-as-body-rather-than-a.patch
Screened by: Alex Miller
An open question is whether we also want to make `repost` stricter as part of this patch, so that it will ensure that `re` and `ost` are a collection