| in plural translations with double pipe.FileDumper::format() method.Translator from protected to private.FileDumper::formatCatalogue which allows format the catalogue without dumping it into file.json_encoding to JsonFileDumperas_tree, inline to YamlFileDumperDiffOperation class has been deprecated and
will be removed in Symfony 3.0, since its operation has nothing to do with 'diff',
so the class name is misleading. The TargetOperation class should be used for
this use-case instead.