I wish that were the case but, unfortunately, you are mistaken. The only reference to wiki in the Github robots.txt file reads:
I have posted a request to Github for allow wiki’s to be indexed by web crawlers.
This situation is a disappointment to me, personally, because I put a lot of effort into providing content related to the algorithms and implementation design used in my open-source project. Some of that information would be useful to others using my software or attempting their own implementations. Of course, since the wiki’s are not indexed, the chances of them being able to find my content and take advantage of it is greatly reduced.