'Returning a RVKC just via the keyword name should return the full value
string of the first card with that keyword.
This test was changed to reflect the requirement in ticket
https://aeon.stsci.edu/ssb/trac/pyfits/ticket/184--previously it required
_test_header[\'DP1\'] to return the parsed float value.'

def test_get_rvkc_by_keyword(self):

    assert (self._test_header['DP1'] == 'NAXIS:    2')
