anchor.diff:        params => Params}.
   
   
  -%% @doc create the command to execute and the environment
  --spec create_cmd_and_env(binary(), binary(), boolean())
  +%% @doc create the command to execute and the stdin input
  +-spec create_cmd_and_stdin(binary(), binary(), boolean())
                           -> {string(), undefined | binary()}.
  -create_cmd_and_env(Cmd, EncJson, false) ->
  +create_cmd_and_stdin(Cmd, EncJson, false) ->
       {binary_to_list(<< Cmd/binary, <<" ">>/binary, EncJson/binary >>),
        undefined};
  -create_cmd_and_env(Cmd, EncJson, true) ->
  +create_cmd_and_stdin(Cmd, EncJson, true) ->
       {binary_to_list(Cmd), EncJson}.
   
   
  
positive.code: %% @doc this module takes care of running a plugin in an environment and
  %% controlling and validating its results.
  %% It is implemented as a gen_server so that each run of a plugin has a
  %% corresponding process in the VM.
  -module(watts_plugin_runner).
  
negative.code:                    true -> true;
                     _    -> false
                 end,
      {CmdLine, CmdStdin} = create_cmd_and_stdin(Cmd, EncodedJson, UseStdin),
      % marcus: this is useful for logging!!
      lager:debug("runner ~p: the command line is (parameter in base64url): ~p. CmdStdin: ~p",
                  [self(), CmdLine, CmdStdin]),
  