tests/test-undo

Don't use 'set -x', fix exports, sed and hexdump usage for Solaris.

#!/bin/sh

mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m "test" -d "0 0"
hg verify
hg parents
hg status
hg undo
hg verify
hg parents
hg status