testsuite: shorter output

    test_with_title_wrap_text_in_a_box (invenio.testsuite.test_utils_text.WrapTextInABoxTest)
    textutils - wrap_text_in_a_box with title. ... ok

becomes:

`textutils - wrap_text_in_a_box with title. ... ok`

Example output [here](https://travis-ci.org/adrianp/invenio/jobs/14657686#L9338).

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>