/usr/lib/python2.7/dist-packages/zope/pagetemplate/tests/output/checkwithxmlheader.html is in python-zope.pagetemplate 3.6.3-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope/pagetemplate/tests/output/../../../../../../../share/pyshared/zope/pagetemplate/tests/output/checkwithxmlheader.html