/usr/lib/python2.7/dist-packages/zope/testrunner/tests/testrunner-ex/sampletests.txt is in python-zope.testrunner 4.4.2-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | This is a sample doctest
>>> x=1
>>> x
1
Blah blah blah
>>> x
1
Blah blah blah
>>> x
1
Blah blah blah
>>> x
1
|