/usr/share/doc/librrd-ruby1.9.1/NEWS.Debian.gz is in librrd-ruby1.9.1 1.4.7-2ubuntu5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/librrd-ruby1.9.1/../librrd4/NEWS.Debian.gz
/usr/share/doc/librrd-ruby1.9.1/../librrd4/NEWS.Debian.gz