Formulas are not being evaluated

[chrisspen]

If you use save_data to write a cell starting with "=", it renders the raw text of the formula and does not evaluate the formula's logic.

>>> from pyexcel_ods import save_data
>>> from collections import OrderedDict
>>> data = OrderedDict()
>>> data.update({"Sheet 1": [
...     ['A', 'B', 'C']] + \
...     [[1, 2, '=A2+B2']]
... })
>>> 
>>> save_data('test.ods', data)