Yup, though he was also intentional about not copying word-for-word, but rather trying to predict the next token (or phrase).
I think I probably learned so much more in between the lines during that period, than if I’d just read the user manuals.
And the same is true even today - spending a few hours code-reading some wonderful open source project will enlighten you immensely.
Code is a social construct - just like music. It prospers in the space between minds, in my opinion.