/usr/lib/ghc-doc/hoogle/monad-logger.txt is in libghc-monad-logger-doc 0.3.1.1-1build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-monad-logger-doc/html/monad-logger.txt