I don't think the author 'intentionally' picked it. Like all the other graphics in the presentation, it looks to have been sourced from somewhere else. Edit: h

I don't think the author 'intentionally' picked it. Like all the other graphics in the presentation, it looks to have been sourced from somewhere else. Edit: https://swtch.com/~rsc/regexp/regexp1.html https://swtch.com/~rsc/regexp/regexp1.html All the graphics come from the above, and no mention of the original article it was taken from. Nice.