ci.ruby-lang.org, which provides the SVN repository for development,
has been migrated to the new machine (220.127.116.11), and the SSH
host keys has been changed. The fingerprints of new keys are given
$ ssh-keygen -l -f /etc/ssh/ssh_host_rsa_key.pub
$ ssh-keygen -l -f /etc/ssh/ssh_host_dsa_key.pub
Please remove the entry for ci.ruby-lang.org from your known_hosts,
and confirm the fingerprint.