docs($location): improve $location.search() docs

Closes #7030

Author: IgorMinar

src/ng/location.js

@@ -399,15 +399,37 @@ LocationHashbangInHtml5Url.prototype =
    *
    * Change search part when called with parameter and return `$location`.
    *
+   *
+   * ```js
+   * // given url http://example.com/#/some/path?foo=bar&baz=xoxo
+   * var searchObject = $location.search();
+   * // => {foo: 'bar', baz: 'xoxo'}
+   *
+   *
+   * // set foo to 'yipee'
+   * $location.search('foo', 'yipee');
+   * // => $location
+   * ```
+   *
    * @param {string|Object.<string>|Object.<Array.<string>>} search New search params - string or
-   * hash object. Hash object may contain an array of values, which will be decoded as duplicates in
-   * the url.
+   * hash object.
+   *
+   * When called with a single argument the method acts as a setter, setting the `search` component
+   * of `$location` to the specified value.
+   *
+   * If the argument is a hash object containing an array of values, these values will be encoded
+   * as duplicate search parameters in the url.
+   *
+   * @param {(string|Array<string>)=} paramValue If `search` is a string, then `paramValue` will
+   * override only a single search property.
+   *
+   * If `paramValue` is an array, it will override the property of the `search` component of
+   * `$location` specified via the first argument.
    *
-   * @param {(string|Array<string>)=} paramValue If `search` is a string, then `paramValue` will override only a
-   * single search parameter. If `paramValue` is an array, it will set the parameter as a
-   * comma-separated value. If `paramValue` is `null`, the parameter will be deleted.
+   * If `paramValue` is `null`, the property specified via the first argument will be deleted.
    *
-   * @return {string} search
+   * @return {Object} If called with no arguments returns the parsed `search` object. If called with
+   * one or more arguments returns `$location` object itself.
    */
   search: function(search, paramValue) {
     switch (arguments.length) {