code: function _bindSigint(state) {
      state.rl.once('SIGINT', function() {
          // Mock a new-line and send an empty result
          state.output.write('\n');
          return _sendResult(state, _.extend(new Error('User pressed CTRL+C'), {'code': 'SIGINT'}));
      });
  }
docs: /*!
  Bind the SIGINT handling to the readline instance, which effectively returns with an empty
  command.