text: const clone = require('lodash/clone');
  
  // const debug = require('./debug')('oxford-comma');
  module.exports = (items) => {
      if (!items.length) {
          return '';
      } else if (items.length === 1) {
          return items[0];
      } else if (items.length === 2) {
          return items.join(' and ');
      } else {
          const clones = clone(items);
          clones[clones.length - 1] = ` and ${clones[clones.length - 1]}`;
          return clones.join(', ');
      }
  };
  