Correct the getText() method of the Message entity to correctly return the...

Correct the getText() method of the Message entity to correctly return the text, with and without the command.

src/Entities/Message.php

@@ -403,11 +403,12 @@ class Message extends Entity
     public function getText($without_cmd = false)
     {
         $text = $this->text;
-        if ($without_cmd) {
-            $command = $this->getFullCommand();
-            if (!empty($command)) {
-                //$text = substr($text, strlen($command.' '), strlen($text));
-                $text = substr($text, strlen($command) + 1, strlen($text));
+
+        if ($without_cmd && $command = $this->getFullCommand()) {
+            if (strlen($command) + 1 < strlen($text)) {
+                $text = substr($text, strlen($command) + 1);
+            } else {
+                $text = '';
             }
         }