Adopt `@PHPUnit55Migration:risky` rule of php-cs-fixer

.php_cs.dist

@@ -8,8 +8,9 @@ return PhpCsFixer\Config::create()
     ->setRules([
         '@Symfony' => true,
         '@Symfony:risky' => true,
-        '@PHPUnit48Migration:risky' => true,
+        '@PHPUnit75Migration:risky' => true,
-        'php_unit_no_expectation_annotation' => false, // part of `PHPUnitXYMigration:risky` ruleset, to be enabled when PHPUnit 4.x support will be dropped, as we don't want to rewrite exceptions handling twice
+        'php_unit_dedicate_assert' => ['target' => '3.5'],
+        'phpdoc_no_empty_return' => false, // triggers almost always false positive
         'array_syntax' => ['syntax' => 'short'],
         'fopen_flags' => false,
         'ordered_imports' => true,

src/Symfony/Component/Console/Tests/Logger/ConsoleLoggerTest.php

@@ -165,7 +165,7 @@ class ConsoleLoggerTest extends TestCase
         if (method_exists($this, 'createPartialMock')) {
             $dummy = $this->createPartialMock('Symfony\Component\Console\Tests\Logger\DummyTest', ['__toString']);
         } else {
-            $dummy = $this->getMock('Symfony\Component\Console\Tests\Logger\DummyTest', ['__toString']);
+            $dummy = $this->createPartialMock('Symfony\Component\Console\Tests\Logger\DummyTest', ['__toString']);
         }
         $dummy->method('__toString')->willReturn('DUMMY');
 

src/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\Debug\Tests\Exception;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Bridge\PhpUnit\ForwardCompatTestTrait;
 use Symfony\Component\Debug\Exception\FlattenException;
 use Symfony\Component\HttpFoundation\Exception\SuspiciousOperationException;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
@@ -31,6 +32,8 @@ use Symfony\Component\HttpKernel\Exception\UnsupportedMediaTypeHttpException;
 
 class FlattenExceptionTest extends TestCase
 {
+    use ForwardCompatTestTrait;
+
     public function testStatusCode()
     {
         $flattened = FlattenException::create(new \RuntimeException(), 403);
@@ -256,7 +259,7 @@ class FlattenExceptionTest extends TestCase
 
         // assertEquals() does not like NAN values.
         $this->assertEquals($array[$i][0], 'float');
-        $this->assertTrue(is_nan($array[$i++][1]));
+        $this->assertNan($array[$i++][1]);
     }
 
     public function testRecursionInArguments()

src/Symfony/Component/DependencyInjection/ContainerBuilder.php

@@ -947,7 +947,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      * with a fluid interface.
      *
      * @param string      $id    The service identifier
-     * @param string $class|null The service class
+     * @param string|null $class The service class
      *
      * @return Definition A Definition instance
      */

src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php

@@ -13,7 +13,6 @@ namespace Symfony\Component\DependencyInjection\Tests;
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\PhpUnit\ForwardCompatTestTrait;
-use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\DependencyInjection\Container;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;

src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php

@@ -509,6 +509,7 @@ class NumberToLocalizedStringTransformerTest extends TestCase
 
     /**
      * @dataProvider nanRepresentationProvider
+     *
      * @see https://github.com/symfony/symfony/issues/3161
      */
     public function testReverseTransformDisallowsNaN($nan)

src/Symfony/Component/Form/Tests/Extension/Core/Type/ButtonTypeTest.php

@@ -28,7 +28,6 @@ class ButtonTypeTest extends BaseTypeTest
     }
 
     /**
-     *
      * @param string $emptyData
      * @param null   $expectedData
      */

src/Symfony/Component/HttpKernel/Tests/Log/LoggerTest.php

@@ -142,7 +142,7 @@ class LoggerTest extends TestCase
         if (method_exists($this, 'createPartialMock')) {
             $dummy = $this->createPartialMock(DummyTest::class, ['__toString']);
         } else {
-            $dummy = $this->getMock(DummyTest::class, ['__toString']);
+            $dummy = $this->createPartialMock(DummyTest::class, ['__toString']);
         }
         $dummy->expects($this->atLeastOnce())
             ->method('__toString')

src/Symfony/Component/Lock/Tests/Store/ExpiringStoreTestTrait.php

@@ -11,7 +11,6 @@
 
 namespace Symfony\Component\Lock\Tests\Store;
 
-use Symfony\Bridge\PhpUnit\ForwardCompatTestTrait;
 use Symfony\Component\Lock\Exception\LockExpiredException;
 use Symfony\Component\Lock\Key;
 use Symfony\Component\Lock\StoreInterface;

src/Symfony/Component/Yaml/Tests/ParserTest.php

@@ -13,7 +13,6 @@ namespace Symfony\Component\Yaml\Tests;
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\PhpUnit\ForwardCompatTestTrait;
-use Symfony\Component\Yaml\Exception\ParseException;
 use Symfony\Component\Yaml\Parser;
 use Symfony\Component\Yaml\Tag\TaggedValue;
 use Symfony\Component\Yaml\Yaml;