ID 492888 - All pages with underscores as the beginning character are missing in the Python Reference.

Problem summary
All pages with underscores as the beginning character are missing in the Python Reference.

Customer reported version
13.0::13.0v5

Customer reported platform

Steps to reproduce
1) Head to the Python Developer's Guide here: https://learn.foundry.com/nuke/developers/13.0/pythonreference/
2) Search for "animControlPoints".

Expected behavior
The pages beginning with underscores are not missing from the Python Developer's guide.

Actual behavior
The pages beginning with underscores are missing from the latest Python Developer's guide, such as _curvelib.AnimControlPoint-class.html

Workaround
Going to a previous version of the Python Dev Guide prior to 13.0 allows users to find the pages with underscores. 

Reproduced by Support in:
Nuke 13.0 - _curvelib.AnimControlPoint-class.html

Unable to reproduce bug in:
Nuke 12.2

Earliest version tested
Nuke 12.2 - This issue doesn't appear in this version and has regressed