/usr/lib/ghc-doc/hoogle/pango.txt is in libghc-pango-doc 0.12.4-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-pango-doc/html/pango.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-pango-doc/html/pango.txt