/usr/lib/ghc-doc/hoogle/hledger-lib.txt is in libghc-hledger-lib-doc 0.22-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hledger-lib-doc/html/hledger-lib.txt