Relax tests to make them compatible with Mime v6.2+

Author: nicolas-grekas

Tests/Mime/TemplatedEmailTest.php

@@ -73,11 +73,9 @@ public function testSymfonySerialize()
     "html": null,
     "htmlCharset": null,
     "attachments": [
-        {
-            "body": "Some Text file",
-            "name": "test.txt",
-            "content-type": null,
-            "inline": false
+        {%A
+            "body": "Some Text file",%A
+            "name": "test.txt",%A
         }
     ],
     "headers": {
@@ -111,11 +109,11 @@ public function testSymfonySerialize()
         ], [new JsonEncoder()]);
 
         $serialized = $serializer->serialize($e, 'json', [ObjectNormalizer::IGNORED_ATTRIBUTES => ['cachedBody']]);
-        $this->assertSame($expectedJson, json_encode(json_decode($serialized), \JSON_PRETTY_PRINT | \JSON_UNESCAPED_SLASHES));
+        $this->assertStringMatchesFormat($expectedJson, json_encode(json_decode($serialized), \JSON_PRETTY_PRINT | \JSON_UNESCAPED_SLASHES));
 
         $n = $serializer->deserialize($serialized, TemplatedEmail::class, 'json');
         $serialized = $serializer->serialize($e, 'json', [ObjectNormalizer::IGNORED_ATTRIBUTES => ['cachedBody']]);
-        $this->assertSame($expectedJson, json_encode(json_decode($serialized), \JSON_PRETTY_PRINT | \JSON_UNESCAPED_SLASHES));
+        $this->assertStringMatchesFormat($expectedJson, json_encode(json_decode($serialized), \JSON_PRETTY_PRINT | \JSON_UNESCAPED_SLASHES));
 
         $n->from('fabien@symfony.com');
         $expected->from('fabien@symfony.com');