Merge branch '4.4' into 5.0

* 4.4:
  fix merge
  Require PHPUnit 9.3 on PHP 8
  [Cache] fix catching auth errors
  Fix CS
  [FrameworkBundle] set default session.handler alias if handler_id is not provided
  Fix CS
  Readability update
  Fix checks for phpunit releases on Composer 2 (resolves #37601)
  [Serializer] Support multiple levels of discriminator mapping
  Use hexadecimal numerals instead of hexadecimals in strings to represent error codes.
  [SCA] Minor fixes on tests
  [WebProfilerBundle] modified url generation to use absolute urls
  [Mailer] Fix reply-to functionality in the SendgridApiTransport
  [Mime] Fix compat with HTTP requests
  ticket_36879 - Fix mandrill raw http request setting from email/name

Author: nicolas-grekas

Tests/Exception/FlattenExceptionTest.php

@@ -161,9 +161,9 @@ public function testPreviousError()
 
         $flattened = FlattenException::createFromThrowable($exception)->getPrevious();
 
-        $this->assertEquals($flattened->getMessage(), 'Oh noes!', 'The message is copied from the original exception.');
-        $this->assertEquals($flattened->getCode(), 42, 'The code is copied from the original exception.');
-        $this->assertEquals($flattened->getClass(), 'ParseError', 'The class is set to the class of the original exception');
+        $this->assertEquals('Oh noes!', $flattened->getMessage(), 'The message is copied from the original exception.');
+        $this->assertEquals(42, $flattened->getCode(), 'The code is copied from the original exception.');
+        $this->assertEquals('ParseError', $flattened->getClass(), 'The class is set to the class of the original exception');
     }
 
     /**
@@ -289,7 +289,7 @@ function () {},
         $this->assertSame(['resource', 'stream'], $array[$i++]);
 
         $args = $array[$i++];
-        $this->assertSame($args[0], 'object');
+        $this->assertSame('object', $args[0]);
         $this->assertTrue('Closure' === $args[1] || is_subclass_of($args[1], '\Closure'), 'Expect object class name to be Closure or a subclass of Closure.');
 
         $this->assertSame(['array', [['integer', 1], ['integer', 2]]], $array[$i++]);
@@ -304,7 +304,7 @@ function () {},
         $this->assertSame(['float', INF], $array[$i++]);
 
         // assertEquals() does not like NAN values.
-        $this->assertEquals($array[$i][0], 'float');
+        $this->assertEquals('float', $array[$i][0]);
         $this->assertNan($array[$i][1]);
     }
 
@@ -344,7 +344,7 @@ public function testTooBigArray()
         $flattened = FlattenException::createFromThrowable($exception);
         $trace = $flattened->getTrace();
 
-        $this->assertSame($trace[1]['args'][0], ['array', ['array', '*SKIPPED over 10000 entries*']]);
+        $this->assertSame(['array', ['array', '*SKIPPED over 10000 entries*']], $trace[1]['args'][0]);
 
         $serializeTrace = serialize($trace);