Chen doesn't use Wikipedia as evidence that Krueger ported the game. He's pointing out that this is what Wikipedia mentions as most notable, and then adds another thing notable about Krueger, the squigglies. If you read the Chen's whole article, he adds more details about the port at the bottom, so he's clearly aware of it. It's fine to use the article as evidence for the port.

These kinds of circular evidence chains do sometimes happen on Wikipedia, but I don't think this is one of them.