Feature: show specs in HTML-documentation

[n2o]

Specs appear in the documentation when called in a REPL. It would be great when these specs would appear in the generated HTML files.

Minimal example:

(require '[clojure.spec.alpha :as s]
         '[clojure.repl :refer [doc]])

(s/fdef add
        :args (s/cat :x int? :y int?)
        :ret int?)

(defn add
  "Insecure add."
  [x y] (+ x y))

(doc add)

Prints:

foo.core/add
([x y])
  Insecure add.
Spec
  args: (cat :x int? :y int?)
  ret: int?

[tirkarthi]

Seems this was merged and reverted due to some issues with reader in #134 . Will be great to see this since the core docs display specs with autodoc : https://github.com/tomfaulhaber/autodoc