cosa-nostra-backstabbers/source/auxils/pettyOrFormat.js

Turbo Mafia bot based off LCN

// Format arrays into gramatically correct ones

module.exports = function (array) {

  // Clone array
  var array = Array.from(array);

  if (array.length > 1) {
    array[array.length - 1] = "or " + array[array.length - 1];
  };

  return array.join(", ");

};