anchor.diff:  
   [NOTE]
   ====
  -This result also demonstrates the new namespace map literal syntax added in 1.9.0-alpha8. Maps may be prefixed with `#:` or `#::` (for autoresolve) to specify a default namespace for all keys in the map. In this example, this is equivalent to `{:clojure.spec/problems ...}`
  +This result also demonstrates the new namespace map literal syntax added in 1.9.0-alpha8. Maps may be prefixed with `#:` or `#::` (for autoresolve) to specify a default namespace for all keys in the map. In this example, this is equivalent to `{:clojure.spec.alpha/problems ...}`
   ====
   
   == Entity Maps
  
positive.code: ;;=> (-1.0 -1.0 -1.5 1.25 -0.5 -1.0 -3.125 -1.5625 1.25 -0.390625)
  ----
  
  To learn more about generators, read the test.check https://clojure.github.io/test.check/intro.html[tutorial] or https://clojure.github.io/test.check/generator-examples.html[examples]. Do keep in mind that while clojure.spec.gen is a large subset of clojure.test.check.generators, not everything is included.
  
  == Instrumentation and Testing
  
  spec provides a set of development and testing functionality in the `clojure.spec.test` namespace, which we can include with:
  
  [source,clojure]
  ----
  (require '[clojure.spec.test :as stest])
  ----
  
  === Instrumentation
  
negative.code: [source,clojure]
  ----
  (s/explain-data ::name-or-id :foo)
  ;;=> #:clojure.spec.alpha{
  ;;     :problems ({:path [:name], 
  ;;                 :pred string?,
  ;;                 :val :foo,
  