If you would like to contribute to sphinxcontrib.spelling directly, these instructions should help you get started. Patches, bug reports, and feature requests are all welcome through the BitBucket site. Contributions in the form of patches or pull requests are easier to integrate and will receive priority attention.
The documentation for sphinxcontrib.spelling is written in reStructuredText and converted to HTML using Sphinx. The build itself is driven by make. You will need the following packages in order to build the docs:
Once all of the tools are installed into a virtualenv using pip, run make html to generate the HTML version of the documentation.