tests/test-help

Add tests/printenv.py

This is a small script that can be used as a hook to print the
HG_* environment variables without relying on the shell.

#!/bin/sh

hg
hg -q
hg help
hg -q help
hg add -h
hg add --skjdfks
hg help diff
hg help status
hg -q help status
hg help foo
hg skjdfks

exit 0