/usr/lib/ghc-doc/hoogle/libghc-mime-mail-doc.txt is in libghc-mime-mail-doc 0.4.11-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-mime-mail-doc/html/mime-mail.txt