fix minor bugs and add do

examples/basic/testdo.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -e
+
+go build -o char ../../main.go
+
+echo "base"
+CHAR_DEV_MODE=true ./char do -h
+echo "local_up"
+CHAR_DEV_MODE=false ./char do local_up -h