format='lrc')
    >>> table = builder.get_result()
    >>> print(table)
    \begin{tabular}{lrc}
    \toprule
    {} &  a &   b \\
    \midrule
    0 &  1 &  b1 \\
    1 &  2 &  b2 \\
    \bottomrule
    \end{tabular}
    <BLANKLINE>
    r
