/usr/lib/ghc-doc/hoogle/libghc-hoauth2-doc.txt is in libghc-hoauth2-doc 1.3.0-1build3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hoauth2-doc/html/hoauth2.txt