Using s/assert instead of assert has advantages: namely a specific reason why the data failed to meet the spec. But it also has disadvantages: the error message does not contain the assertion code the user wrote, so it's harder to see which assertion failed.
I believe we could have the best of both world if s/assert contained the original "assert" code - that way the error message could (optionally) print out this information.
`
(require '[clojure.spec.alpha :as s])
(s/check-asserts true)
(let [x 1]
(s/assert string? x))
;; Spec assertion failed val: 1 fails predicate:
;; :clojure.spec.alpha/unknown
(let [x 1]
(assert (string? x)))
;; Assert failed: (string? x)
`
