Make clear that hg pull -r REV pulls "up to" a revision. The existing message was a bit confusing, making the reader believe that only the specific revision is pulled.

#!/bin/sh

mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m "test" -d "1000000 0"
hg verify
hg parents
hg status
hg rollback
hg verify
hg parents
hg status