anchor.diff:  > Content-Type: application/json
   {}
   < 200
  +< Content-Type: application/json
   { \"ok\": true }
  +"/utf8>>);
  +
  +mock_katt_blueprint_parse_file("/mock/unexpected-disallow.apib") ->
  +  katt_blueprint_parse:string(
  +    <<"--- Test 4 ---
  +
  +GET /unexpected-disallow
  +< 200
  +< Content-Type: application/json
  +{ \"ok\": true, \"{{_}}\": \"{{unexpected}}\" }
   "/utf8>>).
   
   %%%_* Emacs ============================================================
  
positive.code:                    ) ->
    {ok, {{401, []}, [{"Content-Type", "application/json"}], <<"{
      \"error\": \"unauthorized\"
  }
  "/utf8>>}}.
  
  
negative.code: > Accept: text/html
  > Content-Type: application/vnd.katt.test-v{{<version}}+json
  {
      \"ok\": \"{{<some_var}}\"
  }
  < 404
  Not found
  