Correct _#tap doc example. [closes #156]

Former-commit-id: d1f6982e824a97db73546b8594c074b735580f8e

lodash.underscore.js

@@ -3633,13 +3633,13 @@
    * @returns {Mixed} Returns `value`.
    * @example
    *
-   * _.chain([1, 2, 3, 200])
+   * _([1, 2, 3, 4])
    *  .filter(function(num) { return num % 2 == 0; })
    *  .tap(alert)
    *  .map(function(num) { return num * num; })
    *  .value();
-   * // => // [2, 200] (alerted)
-   * // => [4, 40000]
+   * // => // [2, 4] (alerted)
+   * // => [4, 16]
    */
   function tap(value, interceptor) {
     interceptor(value);