code: function formatAll(results, options, showName) {
      var stdout = '';
      if (showName) {
        for (var i = 0; i < results.length; ++i) {
          stdout += results[i].path + ':\n';
          if (options.l) {
            stdout += 'total ' + results[i].size + '\n';
          }
          stdout += results[i].results;
          if (i !== results.length - 1) {
            stdout += '\n\n';
          }
        }
      } else if (results.length === 1) {
        if (options.l && !options.x) {
          stdout += 'total ' + results[0].size + '\n';
        }
        stdout += results[0].results;
      }
      return stdout;
    }
docs: Concatenates the results of multiple
  `execDir` functions into their proper
  form based on options provided.
  
  @param {Array} results
  @param {Object} options
  @param {boolean} showName
  @return {String} stdout
  @api private