Print GO namedtuples in their sections.

def prt_sections(prt, sections, prtfmt, secspc=False):
        """Print GO namedtuples in their sections."""
        num_goids = 0
        for section, nts_flat in sections:
            # Add an empty line between sections, if desired
            if secspc:
                prt.write("\n")
            prt.write("{SECTION}\n".format(SECTION=section))
            num_nts = len(nts_flat)
            num_goids += num_nts
            prt_txt(prt, nts_flat, prtfmt=prtfmt)