/usr/lib/python2.7/dist-packages/formencode/tests/htmlfill_data/data-fill1.txt is in python-formencode 1.3.0-0ubuntu5.
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 | <test tag>
<html><body>
<blah blah="2">
----
<test tag>
<html><body>
<blah blah="2">
|