Produce a plain-text representation of the table.

def _format_table(fmt, headers, rows, colwidths, colaligns):
    """Produce a plain-text representation of the table."""
    lines = []
    hidden = fmt.with_header_hide if (headers and fmt.with_header_hide) else []
    pad = fmt.padding
    headerrow = fmt.headerrow

    padded_widths = [(w + 2*pad) for w in colwidths]
    padded_headers = _pad_row(headers, pad)
    padded_rows = [_pad_row(row, pad) for row in rows]

    if fmt.lineabove and "lineabove" not in hidden:
        lines.append(_build_line(padded_widths, colaligns, fmt.lineabove))

    if padded_headers:
        lines.append(_build_row(padded_headers, padded_widths, colaligns, headerrow))
        if fmt.linebelowheader and "linebelowheader" not in hidden:
            lines.append(_build_line(padded_widths, colaligns, fmt.linebelowheader))

    if padded_rows and fmt.linebetweenrows and "linebetweenrows" not in hidden:
        # initial rows with a line below
        for row in padded_rows[:-1]:
            lines.append(_build_row(row, padded_widths, colaligns, fmt.datarow))
            lines.append(_build_line(padded_widths, colaligns, fmt.linebetweenrows))
        # the last row without a line below
        lines.append(_build_row(padded_rows[-1], padded_widths, colaligns, fmt.datarow))
    else:
        for row in padded_rows:
            lines.append(_build_row(row, padded_widths, colaligns, fmt.datarow))

    if fmt.linebelow and "linebelow" not in hidden:
        lines.append(_build_line(padded_widths, colaligns, fmt.linebelow))

    return "\n".join(lines)