/usr/lib/python2.7/dist-packages/testtools-1.8.1.egg-info/requires.txt is in python-testtools 1.8.1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [test]
fixtures
unittest2>=1.1.0
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