From ab094c02ebbfbc0a3e020f53f98b314765336918 Mon Sep 17 00:00:00 2001
From: Fabien Potencier <fabien@potencier.org>
Date: Tue, 1 Oct 2019 12:10:05 +0200
Subject: [PATCH] [Mailer] Tweak some code

---
 .../Component/Mailer/Transport/RoundRobinTransport.php      | 6 ++----
 src/Symfony/Component/Mailer/Transport/Transports.php       | 4 ++--
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/Symfony/Component/Mailer/Transport/RoundRobinTransport.php b/src/Symfony/Component/Mailer/Transport/RoundRobinTransport.php
index 4f004784ef..37128dda62 100644
--- a/src/Symfony/Component/Mailer/Transport/RoundRobinTransport.php
+++ b/src/Symfony/Component/Mailer/Transport/RoundRobinTransport.php
@@ -35,7 +35,7 @@ class RoundRobinTransport implements TransportInterface
     public function __construct(array $transports, int $retryPeriod = 60)
     {
         if (!$transports) {
-            throw new TransportException(__CLASS__.' must have at least one transport configured.');
+            throw new TransportException(sprintf('"%s" must have at least one transport configured.', static::class));
         }
 
         $this->transports = $transports;
@@ -58,9 +58,7 @@ class RoundRobinTransport implements TransportInterface
 
     public function __toString(): string
     {
-        return $this->getNameSymbol().'('.implode(' ', array_map(function (TransportInterface $transport) {
-            return (string) $transport;
-        }, $this->transports)).')';
+        return $this->getNameSymbol().'('.implode(' ', array_map('strval', $this->transports)).')';
     }
 
     /**
diff --git a/src/Symfony/Component/Mailer/Transport/Transports.php b/src/Symfony/Component/Mailer/Transport/Transports.php
index 38c868862f..c8f7970b32 100644
--- a/src/Symfony/Component/Mailer/Transport/Transports.php
+++ b/src/Symfony/Component/Mailer/Transport/Transports.php
@@ -21,7 +21,7 @@ use Symfony\Component\Mime\RawMessage;
 /**
  * @author Fabien Potencier <fabien@symfony.com>
  */
-class Transports implements TransportInterface
+final class Transports implements TransportInterface
 {
     private $transports;
     private $default;
@@ -64,6 +64,6 @@ class Transports implements TransportInterface
 
     public function __toString(): string
     {
-        return 'all';
+        return '['.implode(',', array_keys($this->transports)).']';
     }
 }