I have moved it from the old Sage wiki to https://trac.sagemath.org/wiki/ReleaseTours/sage-9.6
This now allows all developers to edit it -- a legacy sage-trac account is not required. Please help!
The Trac wiki appears to understand most of the old Sage wiki's markup.
I only had to make the following changes:
1. In section headers, CamelCase words need to be escaped with "!"
2. I had to edit the markup for included images
Also, the automatic table of contents no longer works. Help with fixing it is very welcome.
I would propose that we transfer all other content from the old Sage wiki to the Trac wiki (or other more suitable places) and then close the old Sage wiki.
It would be helpful if someone could work on a script that helps with this task.