merge-slicing: explain an alternative implementation in a comments
It has a better time complexity so a C implementation would likely out perform
the current implementation
# common setup for head checking code
. $TESTDIR/testlib/common.sh
cat >> $HGRCPATH <<EOF
[ui]
logtemplate ="{node|short} ({phase}): {desc}\n"
[phases]
publish=False
[extensions]
strip=
evolve=
EOF
setuprepos() {
echo creating basic server and client repo
hg init server
cd server
mkcommit root
hg phase --public .
mkcommit A0
cd ..
hg clone server client
}