/usr/share/man/man1/xzegrep.1.gz is in xz-utils 5.1.1alpha+20120614-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/xzgrep.1.gz
/usr/share/man/man1/xzgrep.1.gz