Minor doc nit for _.runInContext. [ci skip]

lodash.js

@@ -556,7 +556,7 @@
    * @memberOf _
    * @category Utilities
    * @param {Object} [context=root] The context object.
-   * @returns {Function} Returns the `lodash` function.
+   * @returns {Function} Returns a new `lodash` function.
    */
   function runInContext(context) {
     // Avoid issues with some ES3 environments that attempt to use values, named