Refinement of the run function in app.py

Author: MakSl

testgres/plugins/pg_probackup2/pg_probackup2/app.py

@@ -73,6 +73,9 @@ def run(self, command, gdb=False, old_binary=False, return_id=True, env=None,
             command = [command[0], *use_backup_dir.pb_args, *command[1:]]
         elif use_backup_dir:
             command = [command[0], *self.backup_dir.pb_args, *command[1:]]
+        else:
+            use_backup_dir = self.backup_dir.pb_args[2:]
+            command = [command[0], *use_backup_dir, *command[1:]]
 
         if not self.probackup_old_path and old_binary:
             logging.error('PGPROBACKUPBIN_OLD is not set')