run merge program in repo root. before, merge program was run in user current directory. Well defined location is better for scripts. no more need to pass HG_ROOT to merge program now.

#!/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