Add a summary for hasRedirect function

src/Exception/OAuthServerException.php

@@ -304,6 +304,8 @@ class OAuthServerException extends \Exception
     }
 
     /**
+     * Check if the exception has an associated redirect URI.
+     *
      * Returns whether the exception includes a redirect, since
      * getHttpStatusCode() doesn't return a 302 when there's a
      * redirect enabled. This helps when you want to override local