/usr/share/doc/libtbb-dev/Release_Notes.txt.gz is in libtbb-dev 2017~U7-8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libtbb-dev/../libtbb2/Release_Notes.txt.gz
/usr/share/doc/libtbb-dev/../libtbb2/Release_Notes.txt.gz