[PATCH v3 0/3] Better id: link buttonization

[Austin Clements]

This is v3 of id:"1352609175-12790-1-git-send-email-amdragon at mit.edu".
Tomi pointed out in [1] that I'd reversed OUTPUT and EXPECTED in the
test, which this version fixes.  There are no other changes, so I'm
marking this patch ready since Ethan and Tomi approved v2.

[1] id:m2obj0ega4.fsf at guru.guru-group.fi