/usr/lib/ghc-doc/hoogle/curl.txt is in libghc-curl-doc 1.3.8-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-curl-doc/html/curl.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-curl-doc/html/curl.txt