Xlsxwriter

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* Fix for issue where array formulas weren't included in the output file for
certain ranges/conditions. :issue:`735`.

----------------------------

* Added support for chart :ref:`custom data labels
<chart_series_option_custom_data_labels>`. :feature:`343`.

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* Added support for ``stacked`` and ``percent_stacked`` Line charts.

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* Fix for issue where duplicate images with hyperlinks weren't handled
correctly. :issue:`686`.

* Removed ``ReservedWorksheetName`` exception which was used with the reserved
worksheet name "History" since this name is allowed in some Excel variants.
:issue:`688`.

* Fix for worksheet objects (charts, images and textboxes) that are inserted
with an offset that starts in a hidden cell. :issue:`676`.

* Fix to allow handling of NoneType in :func:`add_write_handler`.
:issue:`677`.

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* Fix for duplicate images being copied to an XlsxWriter file. Excel uses an
optimization where it only stores one copy of a repeated/duplicate image in
a workbook. XlsxWriter didn't do this which meant that the file size would
increase when then was a large number of repeated images. This release fixes
that issue and replicates Excel's behavior. :issue:`615`.

* Added documentation on :ref:`num_format_categories` and
:ref:`num_format_locale`.

* Added note to :func:`protect()` about how it is possible to encrypt an
XlsxWriter file using a third party, cross platform, open source tool called
`msoffice-crypt <https://github.com/herumi/msoffice>`_.

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* Added option to remove style from worksheet tables. :feature:`670`.