/usr/lib/ghc-doc/hoogle/bmp.txt is in libghc-bmp-doc 1.2.3.4-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-bmp-doc/html/bmp.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-bmp-doc/html/bmp.txt