pluralize = function (word, count) {
  return (count === 1 ? word : `${word}s`);
}
Given a word and a count, append an s if count is not one.
@param {string} word A word in its singular form.
@param {int} count A number controlling whether word should be pluralized.
@returns {string} The original word with an s on the end if count is not one.