/usr/lib/ghc-doc/hoogle/aeson.txt is in libghc-aeson-doc 0.7.0.3-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-aeson-doc/html/aeson.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-aeson-doc/html/aeson.txt