Simply containing each number sequence is a significantly weaker property than having them all occur at the right frequency. Still, while nobody has proven it, it’s generally expected to be true.

The majority of dumb stuff in Javascript is that it has some counterintuitive way of doing something that it shouldn’t do at all, so only teaching the good parts works. So teaching just the good parts is pretty reasonable.

In Python you put it in a multiline string, since it has those but not multiline comments.

But that’s mostly labor humans were doing anyway.

Flag waving bot and gif reverse bot come to mind. The value is just fun, but if fun isn’t valuable, what is?