Below pasted the whole updater-script code.
show_progress(0.500000, 0);
format("ext4 EMMC /dev/block/mmcblk0p3 "0", "MTD", "system");
mount("ext4 EMMC /dev/block/mmcblk0p3 "0", "MTD", "system", "/system");
mount("MTD", "userdata", "/data");
delete("/data/local")...