/usr/lib/ghc-doc/hoogle/PSQueue.txt is in libghc-psqueue-doc 1.1-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-psqueue-doc/html/PSQueue.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-psqueue-doc/html/PSQueue.txt