Fix Yaml Swagger export (#2256)

* Fix Yaml Swagger export

* Increase inlining depth to improve readability

Author: antograssiot

src/Bridge/Symfony/Bundle/Command/SwaggerCommand.php

@@ -67,8 +67,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
     {
         $documentation = new Documentation($this->resourceNameCollectionFactory->create(), $this->apiTitle, $this->apiDescription, $this->apiVersion, $this->apiFormats);
         $data = $this->documentationNormalizer->normalize($documentation);
-        $content = $input->getOption('yaml') ? Yaml::dump($data, Yaml::DUMP_OBJECT_AS_MAP) : json_encode($data, JSON_PRETTY_PRINT);
-
+        $content = $input->getOption('yaml') ? Yaml::dump($data, 6, 4, Yaml::DUMP_OBJECT_AS_MAP) : json_encode($data, JSON_PRETTY_PRINT);
         if (!empty($input->getOption('output'))) {
             file_put_contents($input->getOption('output'), $content);
             $output->writeln(

tests/Bridge/Symfony/Bundle/Command/SwaggerCommandTest.php

@@ -51,7 +51,18 @@ public function testExecuteWithYaml()
     {
         $this->tester->run(['command' => 'api:swagger:export', '--yaml' => true]);
 
-        $this->assertYaml($this->tester->getDisplay());
+        $result = $this->tester->getDisplay();
+        $this->assertYaml($result);
+
+        $expected = <<<YAML
+    /dummy_cars:
+        get:
+            tags:
+                - DummyCar
+            operationId: getDummyCarCollection
+YAML;
+
+        $this->assertContains($expected, $result);
     }
 
     public function testWriteToFile()