make_squash_message () {
if test -f "$SQUASH_MSG"; then
COUNT=$(($(sed -n "s/^# This is [^0-9]*\([1-9][0-9]*\).*/\1/p" \
- < "$SQUASH_MSG" | tail -n 1)+1))
+ < "$SQUASH_MSG" | sed -ne '$p')+1))
echo "# This is a combination of $COUNT commits."
sed -e 1d -e '2,/^./{
/^$/d