Use PHP functions as array_map callbacks when possible

Author: javiereguiluz

Tests/DependencyInjection/FrameworkExtensionTest.php

@@ -224,7 +224,7 @@ public function testTranslator()
         $this->assertEquals('translator.default', (string) $container->getAlias('translator'), '->registerTranslatorConfiguration() redefines translator service from identity to real translator');
         $options = $container->getDefinition('translator.default')->getArgument(3);
 
-        $files = array_map(function ($resource) { return realpath($resource); }, $options['resource_files']['en']);
+        $files = array_map('realpath', $options['resource_files']['en']);
         $ref = new \ReflectionClass('Symfony\Component\Validator\Validation');
         $this->assertContains(
             strtr(dirname($ref->getFileName()).'/Resources/translations/validators.en.xlf', '/', DIRECTORY_SEPARATOR),