Return a full width column. Note that the padding is inherited
        from the first cell which inherits from column_padding.

def format_fullwidth(self, value):
        """ Return a full width column. Note that the padding is inherited
        from the first cell which inherits from column_padding. """
        assert isinstance(value, VTMLBuffer)
        pad = self.colspec[0]['padding']
        fmt = self.make_formatter(self.width - pad, pad,
                                  self.table.title_align)
        return VTMLBuffer('\n').join(fmt(value))