anchor.diff:    (ct/routes [[:get "articles/:id" article-detail]]))
   ----
   
  -Additionally to the basic token for represent the url parameter, _catacumba_ also allows use of
  -regular expressions for delimit the input or mark a url token optional.
  +Additionally to the basic token for representing URL parameters, _catacumba_ also allows the use of
  +regular expressions for delimiting the input or marking a URL token optional.
   
   See the following table for all supported URL tokens:
   
  
positive.code:                [:get "dashboard" my-dashboard-handler]]]))
  ----
  
  The error handler aspect is very similar to standard http handler, the difference is that it receives
  additional parameter the throwable instance:
  
  [source, clojure]
  ----
  
negative.code: (defn example-handler
    [context]
    (let [body (:body context)]
      (println "Received body:" body)
      (http/no-content)))
  
  (def app
  