/usr/lib/ghc-doc/hoogle/tokyocabinet-haskell.txt is in libghc-tokyocabinet-doc 0.0.5-8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-tokyocabinet-doc/html/tokyocabinet-haskell.txt