pedanticdm [1] filed a deletion request for ddt [2]: 0 votes, 0 popularity. Packaging last updated circa 2016. Home page URL is a road to nowhere as well. Best we delete this, I say.
[1] https://aur.archlinux.org/account/pedanticdm/ [2] https://aur.archlinux.org/pkgbase/ddt/
