Merge branch '2.7' into 2.8

* 2.7:
  fixed CS
  tweaked default CS fixer config
  [HttpKernel] Dont close the output stream in debug
  move HttpKernel component to require section
  Fixed oci and sqlsrv merge queries when emulation is disabled - fixes #17284
  [Session] fix PDO transaction aborted under PostgreSQL
  [Console] Use InputInterface inherited doc as possible
  add docblock type elements to support newly added IteratorAggregate::getIterator PhpStorm support
  FormBuilderInterface: fix getForm() return type.
  Fixed typo in PHPDoc

Author: fabpot

Tests/Encoder/XmlEncoderTest.php

@@ -249,7 +249,8 @@ public function testEncodeSerializerXmlRootNodeNameOption()
         $this->assertEquals($expected, $serializer->serialize($array, 'xml', $options));
     }
 
-    public function testEncodeTraversableWhenNormalizable() {
+    public function testEncodeTraversableWhenNormalizable()
+    {
         $this->encoder = new XmlEncoder();
         $serializer = new Serializer(array(new CustomNormalizer()), array('xml' => new XmlEncoder()));
         $this->encoder->setSerializer($serializer);
@@ -261,7 +262,6 @@ public function testEncodeTraversableWhenNormalizable() {
 XML;
 
         $this->assertEquals($expected, $serializer->serialize(new NormalizableTraversableDummy(), 'xml'));
-
     }
 
     public function testDecode()