Code of the OTP MIX Tutorial?

Where is the official code of the OTP MIX Tutorial?
Tutorial: Introduction to Mix - The Elixir programming language

I did mine Git:

but I wonder if there is the official code.

:wave: Hi!

AFAIK the code used in the tutorial came from José, and is at his repository


That repo was created with a previous version of MIX as per the file comparison I made.
Maybe it’s a good idea to include that repository into the MIX OTP guide.
So people learning Elixir can download, run, test, and analyze the code directly.

Is not clear to me how to contribute there… :S