Documenting ROOT Pythonizations

Some ROOT classes have pythonizations that require additional documentation. These can be added as special boxes to the rendered Doxygen page of their corresponding C++ class. As an example, see the Python-specific RDataFrame docs. This documentation is written in the pythonization files corresponding to the original C++ class, which can be found in <root_sources>/bindings/pyroot/pythonizations/python/ROOT/_pythonization. Documentation is added as a module-level docstring, which should follow the template below. Replace {CLASS_NAME} with the corresponding C++ class name and {DOCUMENTATION_BODY} with the documentation body. The documentation body supports standard Doxygen tags and other formatting methods (see also the documentation formatting tips).

r'''
\pythondoc {CLASS_NAME}
{DOCUMENTATION_BODY}
\endpythondoc
'''

The documentation added this way can be directly linked to by appending #python to the URL of the doxygen page (i.e., https://root.cern/doc/master/classROOT_1_1RDataFrame.html#python).