/usr/share/doc/ is in arpalert 2.0.12-1.
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..
/usr/share/doc/arpalert/
/usr/share/doc/arpalert/copyright
/usr/share/doc/arpalert/changelog.gz
/usr/share/doc/arpalert/examples/
/usr/share/doc/arpalert/examples/scripts/
/usr/share/doc/arpalert/examples/scripts/ubuntu_zenity.sh
/usr/share/doc/arpalert/examples/scripts/test/
/usr/share/doc/arpalert/examples/scripts/test/just_one_arp_request.sh
/usr/share/doc/arpalert/examples/scripts/test/send_flood_local
/usr/share/doc/arpalert/examples/scripts/test/testcharge.sh
/usr/share/doc/arpalert/examples/scripts/test/broadping.sh
/usr/share/doc/arpalert/examples/scripts/add_allowed_arpalert_address.sh
/usr/share/doc/arpalert/examples/scripts/dns_leases.sh
/usr/share/doc/arpalert/examples/scripts/send_alert.pl
/usr/share/doc/arpalert/examples/scripts/send_alert.sh
/usr/share/doc/arpalert/changelog.Debian.gz