/usr/lib/python2.7/dist-packages/zope/testrunner/tests/testrunner-ex/README.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 | This directory and its subdirectories contain example tests for
testing the test runner, testrunner.py.
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