Update persisted-model.js

Remove trailing whitespace.

lib/persisted-model.js

@@ -181,7 +181,8 @@ module.exports = function(registry) {
    * ```
    * { where: { key: val, key2: {gt: 'val2'}, ...} }
    * ```
-   * <br/>See [Where filter](https://docs.strongloop.com/display/LB/Where+filter#Wherefilter-Whereclauseforqueries).
+   * <br/>See
+   * [Where filter](https://docs.strongloop.com/display/LB/Where+filter#Wherefilter-Whereclauseforqueries).
    *
    * @callback {Function} callback Callback function called with `(err, returned-instances)` arguments.    Required.
    * @param {Error} err Error object; see [Error object](http://docs.strongloop.com/display/LB/Error+object).