code: function addStats(collection, pkg) {
        var coverageType, stat;
        for (coverageType in collection) {
          if (collection.hasOwnProperty(coverageType)) {
            for (stat in collection[coverageType]) {
              if (collection[coverageType].hasOwnProperty(stat)) {
                collection[coverageType][stat] = collection[coverageType][stat] +
                pkg[coverageType][stat];
              }
            }
          }
        }
      }
docs: Helper function to append statistic properties from the provided collection to the provided package.json
  @param {Object} collection - a collection of statistic properties
  @param {Object} pkg - package.json object