Fix regex for namespace extraction of custom command classes

Author: noplanman

CHANGELOG.md

@@ -12,6 +12,7 @@ Exclamation symbols (:exclamation:) note something of importance e.g. breaking c
 ### Deprecated
 ### Removed
 ### Fixed
+- Regex for namespace extraction from custom command classes.
 ### Security
 
 ## [0.72.0] - 2021-04-16

src/Telegram.php

@@ -391,7 +391,7 @@ public function getCommandObject(string $command, string $filepath = ''): ?Comma
     protected function getFileNamespace(string $src): ?string
     {
         $content = file_get_contents($src);
-        if (preg_match('#^\s+namespace\s+(.+?);#m', $content, $m)) {
+        if (preg_match('#^\s*namespace\s+(.+?);#m', $content, $m)) {
             return $m[1];
         }