Provide proper example syntax
sphinx/numpydoc has a special syntax for examples that evaluates the code and prints the results. This does not work for MATLAB, that's why we have not used it for the MATLAB toolbox.
The syntax is described here. https://numpydoc.readthedocs.io/en/latest/format.html#examples
For this to work, HoToPy needs to be available when the sphinx doc is generated.