Merged r10596 from trunk to 2.1-stable (#9732)
German translation updated by Raphael Kallensee.
remove empty line and add newline at end of test/fixtures/changes.yml
Japanese translation updated by Go MAEDA (#12067)
Japanese translation improvement by Go MAEDA (#12061)
German translation updated by Raphael Kallensee (#9732)
add newline at end of test/fixtures/user_preferences.yml
add newline at end of test/fixtures/documents.yml
remove empty line from end of test/fixtures/issue_relations.yml
Bulgarian translation updated by Ivan Cenov (#12064)
remove empty line and add newline at end of test/fixtures/projects.yml
