Improve docs

docs/docs/ASYNC.md

@@ -341,7 +341,7 @@ class MyLoop extends Loop
     public function loop()
     {
         $MadelineProto = $this->API;
-        $logger = $MadelineProto->logger;
+        $logger = &$MadelineProto->logger;
         $callable = $this->callable;
 
         $result = null;
@@ -442,7 +442,7 @@ class MySuperLoop extends ResumableSignalLoop
     public function loop()
     {
         $MadelineProto = $this->API;
-        $logger = $MadelineProto->logger;
+        $logger = &$MadelineProto->logger;
 
         while (true) {
             $t = time();
@@ -516,4 +516,4 @@ The return value of the callable can be:
 * `GenericLoop::PAUSE` - The loop will pause forever (or until the `resume` method is called on the loop object from outside the loop)
 * `GenericLoop::CONTINUE` - Return this if you want to rerun the loop without waiting
 
-<a href="https://docs.madelineproto.xyz/docs/CREATING_A_CLIENT.html">Next section</a>
+<a href="https://docs.madelineproto.xyz/docs/CREATING_A_CLIENT.html">Next section</a>

docs/docs/UPDATES.md

@@ -189,6 +189,8 @@ $this->{'user2.madeline'}->messages->sendMessage(['peer' => '@danogentili', 'mes
 
 If you intend to use your own constructor in the event handler, make sure to call the parent construtor with the only parameter provided to your constructor.
 
+If you need to use the [__sleep](https://www.php.net/manual/en/language.oop5.magic.php#object.sleep) function, make sure it is called `__magic_sleep`, instead.  
+
 The update handling loop is started by the `$MadelineProto->loop()` method, and it will automatically restart the script if execution time runs out.
 
 To break out of the loop just call `die();`, or throw an exception from within (make sure to catch it outside, in the `$MadelineProto->loop()` call).