anchor.diff:                 , Result
                  )
     end;
  -run_scenario(_, [], _, _, Acc) ->
  +run_operations(_, [], _, Acc) ->
     Acc.
   
   make_request_url(_, Url="http://"++_)  -> Url;
  
positive.code: %%%   "{{&gt;key}}"  Store value of the whole string
  %%%               (key must be unique within testcase)
  %%%   "{{&lt;key}}"  Recall stored value.
  %%%   "{{&gt;key&lt;}}" Substitute with value from SubVars list in run/3
  %%% </pre>
  %%% @end
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
negative.code:          , Result
           ]).
  
  substitute(Bin) ->
    Vars = get(),
    substitute(Bin, Vars).
  
  substitute(Bin, [])         -> Bin;
  substitute(Bin, [{K, V}|T]) -> substitute(substitute(Bin, K, V), T).
  
  substitute(Bin, K0, V) ->
    ?VAR_PREFIX ++ K1 = to_list(K0),
    K = ?RECALL_BEGIN_TAG ++ K1 ++ ?RECALL_END_TAG,
    re:replace(Bin, K, to_list(V), [{return, binary}, global]).
  
  %%%_* Validation -------------------------------------------------------
  validate(E = #katt_response{}, A = #katt_response{}) ->
  