As you can see, that repo from 2 years ago even originates the "# attention, what we cannot get enough of" comment and is an exact 1:1 match to Automatics commit, while the one from NovelAI even has a small change in the if clause that Automatic doesn't have.
The code that was taken from Anlatan is actually this:
https://user-images.githubusercontent.com/23345188/194727441...
But that same GitHub issue also shows code from the lucidrains repo (the picture you've linked there) and people have latched onto it saying nothing was taken when the picture I linked is right above it containing code that doesn't exist outside the leaked code and Automatic's fork.