merge: pull user messages out to hg.py - add _update for shadowing in clone - add _showstats helper - remove update parameter defaults - move stats message and merge help messages

#!/bin/sh

echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH

hg init a
cd a

echo 'base' > base
hg ci -Ambase -d '1 0'

hg qnew -mmqbase mqbase

hg qsave
hg qrestore 2