/usr/lib/ghc-doc/hoogle/reform-blaze.txt is in libghc-reform-blaze-doc 0.2.0-1build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-reform-blaze-doc/html/reform-blaze.txt