Write out a single VCF line with breakpoint information.

def _write_vcf_breakend(brend, out_handle):
    """Write out a single VCF line with breakpoint information.
    """
    out_handle.write("{0}\n".format("\t".join(str(x) for x in
        [brend.chrom, brend.pos + 1, brend.id, brend.ref, brend.alt,
         ".", "PASS", brend.info])))