Merge branch '4.2'

* 4.2:
  New extensions were released supporting PHP 7.3
  Remove "internal" annotation from datacollector serialization methods
  replace mocks with real objects in tests
  [DependencyInjection] fix #29930 add $lazyLoad flag to the generated factory code for lazy non-shared services
  escape function does not always take a string
  Fix phpunit 8 compatibility
  render integer types with grouping as text input
  ignore _method forms in NativeRequestHandler
  don't lose int precision with not needed type casts

Author: nicolas-grekas

Tests/Extension/AbstractBootstrap3LayoutTest.php

@@ -1986,6 +1986,22 @@ public function testInteger()
         );
     }
 
+    public function testIntegerTypeWithGroupingRendersAsTextInput()
+    {
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\IntegerType', 123, [
+            'grouping' => true,
+        ]);
+
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
+'/input
+    [@type="text"]
+    [@name="name"]
+    [@class="my&class form-control"]
+    [@value="123"]
+'
+        );
+    }
+
     public function testLanguage()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\LanguageType', 'de');