防止重复补全 help 命令

components/system/source/shell/sh.c

@@ -2954,9 +2954,12 @@ SH_CMD_FN(_cmd_print_help)
 }
 
 SH_CMD_CP_FN(_cmd_print_help_param)
+{
+    if (argc + flag != 2 || (argc >= 1 && (strcmp(argv[0], "help") != 0)))
     {
         _sh_completion_cmd(sh_hdl, argc, argv, 0);
     }
+}
 
 SH_CMD_FN(_cmd_echo_on)
 {