/usr/share/doc/ is in libpacklib1-dev 20061220+dfsg3-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libpacklib1-dev/
/usr/share/doc/libpacklib1-dev/README.64-bit
/usr/share/doc/libpacklib1-dev/README.Debian
/usr/share/doc/libpacklib1-dev/copyright
/usr/share/doc/libpacklib1-dev/examples/
/usr/share/doc/libpacklib1-dev/examples/chbook-example.c
/usr/share/doc/libpacklib1-dev/examples/hbook-cwn.c
/usr/share/doc/libpacklib1-dev/examples/hbook-cwnc.c
/usr/share/doc/libpacklib1-dev/examples/hbook-ntuple.c
/usr/share/doc/libpacklib1-dev/examples/minuit-fcn.c
/usr/share/doc/libpacklib1-dev/examples/minuit-fcn.f
/usr/share/doc/libpacklib1-dev/examples/minuit-main.c
/usr/share/doc/libpacklib1-dev/examples/read_rwntuple.c
/usr/share/doc/libpacklib1-dev/NEWS.Debian.gz
/usr/share/doc/libpacklib1-dev/changelog.Debian.gz