/usr/lib/ghc-doc/hoogle/libghc-xml-hamlet-doc.txt is in libghc-xml-hamlet-doc 0.4.1.1-1build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-xml-hamlet-doc/html/xml-hamlet.txt