Fix OS examples annotated by Yitao

desktop_env/controllers/setup.py

@@ -257,7 +257,7 @@ class SetupController:
                         with open(os.path.join(self.cache_dir, stderr), "w") as f:
                             f.write(results["error"])
                     logger.info("Command executed successfully: %s -> %s"
-                                , " ".join(command)
+                                , " ".join(command) if isinstance(command, list) else command
                                 , response.text
                                 )
                 else: