Column alignment with colspans

Created originally on Bitbucket by Anonymous

The column-alignment seems to be linked to the first row. If cells in the first row span columns, then it results in an error:

ValueError: not enough columns for field options

But if in column-alignment the number of entries matches the number of entries in the first row, then there is no error.

A complete sample which gives error:

.. table:: Query Results
:column-alignment: left right right right right right right

=========      ==== ==== =========        ======= ======= =========
Continent            Visits                      Bounce Rate
---------      -------------------        -------------------------
\              curr prev %chg             curr    prev    %chg
=========      ==== ==== =========        ======= ======= =========
Americas       820  851  -0.036428        .414634 .467685 -0.113433
Europe         605  501   0.207585        .469421 .425150  0.10413
=========      ==== ==== =========        ======= ======= =========