/usr/share/doc/libfftw3-bin/NEWS.gz is in libfftw3-bin 3.3.4-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libfftw3-bin/../libfftw3-double3/NEWS.gz
/usr/share/doc/libfftw3-bin/../libfftw3-double3/NEWS.gz