unit tests and fixes

repertory/librepertory/src/app_config.cpp

@@ -1105,7 +1105,7 @@ void app_config::save() {
   recur_mutex_lock lock(read_write_mutex_);
 
   auto file_path = get_config_file_path();
-  if (not(config_changed_ || utils::file::file(file_path).exists())) {
+  if (not config_changed_ && utils::file::file(file_path).exists()) {
     return;
   }