Merge branch '2.8' into 3.0

* 2.8:
  [DependencyInjection] fix dumped YAML snytax
  Remove InputOption::VALUE_REQUIRED mode from $default parameter description as InputOption::setDefault() throws an exception only when called in InputOption::VALUE_NONE mode. In practice the $default value could still be accessed in InputOption::VALUE_REQUIRED mode in case InputOption was never set but accessed from InputDefinition::getOption() method
  [Form] Fixed violation mapping if multiple forms are using the same (or part of the same) property path
  fix FQCN in tests added by #17694
  Fix locale and written standard inconsistencies for Norwegian translations
  [Form] [Validator] Fix locale inconsistencies in Norwegian translations
  [TwigBridge] Symfony 3.1 forward compatibility
  fixed CS
  [DependencyInjection] fixed exceptions thrown by get method of ContainerBuilder
  [Yaml] properly parse lists in object maps
  [FrameworkBundle] Remove unused private method.
  [Form] remove useless code in ResizeFormListener
  [Config] Fix EnumNodeDefinition to allow building enum nodes with one element
  fix choice_value option in EntityType and add some tests

Author: fabpot

Console/Descriptor/TextDescriptor.php

@@ -411,17 +411,6 @@ private function formatRouterConfig(array $config)
         return trim($configAsString);
     }
 
-    /**
-     * @param string $section
-     * @param string $message
-     *
-     * @return string
-     */
-    private function formatSection($section, $message)
-    {
-        return sprintf('<info>[%s]</info> %s', $section, $message);
-    }
-
     /**
      * @param callable $callable
      *