Add _.rangeRight docs. [ci skip]

lodash.js

@@ -1517,10 +1517,10 @@
      * `methodOf`, `mixin`, `modArgs`, `modArgsSet', `negate`, `nthArg`, `omit`,
      * `omitBy`, `once`, `over`, `overEvery`, `overSome`, `partial`, `partialRight`,
      * `partition`, `pick`, `pickBy`, `plant`, `property`, `propertyOf`, `pull`,
-     * `pullAll`, `pullAllBy`, `pullAt`, `push`, `range`, `rearg`, `reject`,
-     * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
-     * `slice`, `sort`, `sortBy`, `sortByOrder`, `splice`, `spread`, `tail`,
-     * `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `tap`, `throttle`,
+     * `pullAll`, `pullAllBy`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`,
+     * `reject`, `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`,
+     * `shuffle`, `slice`, `sort`, `sortBy`, `sortByOrder`, `splice`, `spread`,
+     * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `tap`, `throttle`,
      * `thru`, `toArray`, `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`,
      * `transform`, `unary`, `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`,
      * `uniqWith`, `unset`, `unshift`, `unzip`, `unzipWith`, `values`, `valuesIn`,
@@ -3247,6 +3247,16 @@
       return min + nativeFloor(nativeRandom() * (max - min + 1));
     }
 
+    /**
+     * The base implementation of `_.range` and `_.rangeRight`.
+     *
+     * @private
+     * @param {number} [start=0] The start of the range.
+     * @param {number} end The end of the range.
+     * @param {number} [step=1] The value to increment or decrement by.
+     * @param {boolean} [fromRight] Specify iterating from right to left.
+     * @returns {Array} Returns the new array of numbers.
+     */
     function baseRange(start, end, step, fromRight) {
       start = toNumber(start);
       start = start === start ? start : 0;
@@ -3268,7 +3278,7 @@
           result[index] = (end -= step);
         } else {
           result[index] = start;
-          start+= step;
+          start += step;
         }
       }
       return result;
@@ -7599,8 +7609,8 @@
      *
      * The guarded methods are:
      * `ary`, `curry`, `curryRight`, `drop`, `dropRight`, `every`, `fill`,
-     * `invert`, `parseInt`, `random`, `range`, `slice`, `some`, `sortBy`,
-     * `take`, `takeRight`, `template`, `trim`, `trimEnd`, `trimStart`,
+     * `invert`, `parseInt`, `random`, `range`, `rangeRight`, `slice`, `some`,
+     * `sortBy`, `take`, `takeRight`, `template`, `trim`, `trimEnd`, `trimStart`,
      * and `words`
      *
      * @static
@@ -13309,6 +13319,40 @@
       return baseRange(start, end, step);
     }
 
+    /**
+     * This method is like `_.range` except that it populates values in
+     * descending order.
+     *
+     * @static
+     * @memberOf _
+     * @category Utility
+     * @param {number} [start=0] The start of the range.
+     * @param {number} end The end of the range.
+     * @param {number} [step=1] The value to increment or decrement by.
+     * @returns {Array} Returns the new array of numbers.
+     * @example
+     *
+     * _.rangeRight(4);
+     * // => [3, 2, 1, 0]
+     *
+     * _.rangeRight(-4);
+     * // => [-3, -2, -1, 0]
+     *
+     * _.rangeRight(1, 5);
+     * // => [4, 3, 2, 1]
+     *
+     * _.rangeRight(0, 20, 5);
+     * // => [15, 10, 5, 0]
+     *
+     * _.rangeRight(0, -4, -1);
+     * // => [-3, -2, -1, 0]
+     *
+     * _.rangeRight(1, 4, 0);
+     * // => [4, 4, 4]
+     *
+     * _.rangeRight(0);
+     * // => []
+     */
     function rangeRight(start, end, step) {
       if (step && isIterateeCall(start, end, step)) {
         end = step = undefined;