printf line cause a FAIL: message when all test cases are passing

[dschveninger]

We had someone leave fmt.printf statement it the test and it wrote the following

anExampleKey%!(EXTRA string=aValue, vertypes.VersionBoundary={1.0.0 2.0.0 []})anExampleKey%!(EXTRA string=aValue2, vertypes.VersionBoundary={2.0.0 []})

The test passed but it was summarized as a failure in the end

Hope this helps to identify the issue, if not let me know. Thanks for the tool