merged branch craue/patch-18 (PR symfony#4094)

Commits ------- ee57c04 added missing dot in FormType as follow-up to symfony#3922 Discussion ---------- added missing dot in FormType as follow-up to symfony#3922 added missing dot in FormType as follow-up to symfony#3922

Author: fabpot

src/Symfony/Component/Form/Extension/Core/Type/FormType.php

@@ -201,7 +201,7 @@ public function getDefaultOptions()
  'label' => null,
  'attr' => array(),
  'virtual' => false,
- 'invalid_message' => 'This value is not valid',
+ 'invalid_message' => 'This value is not valid.',
  'invalid_message_parameters' => array(),
  'translation_domain' => 'messages',
  );