Fix newline violation in app/helpers/preferences_helper.rb

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/helpers/preferences_helper.rb

@@ -65,4 +65,4 @@ module PreferencesHelper
   def anonymous_project_view
     @project.empty_repo? || !can?(current_user, :download_code, @project) ? 'activity' : 'readme'
   end
-end
\ No newline at end of file
+end