message fix

Author: rez1dent3

src/Internal/Service/DatabaseService.php

@@ -59,7 +59,7 @@ public function transaction(callable $callback)
             $this->regulatorService->purge();
 
             throw new TransactionFailedException(
-                'Transaction failed. Message: ' . $throwable->getMessage(),
+                'Transaction failed. Message: '.$throwable->getMessage(),
                 ExceptionInterface::TRANSACTION_FAILED,
                 $throwable
             );