OK, I overlooked that, you're right here, so probably he copied it from yurimir.

But does this single sentence which was added by yurimir, which is very generic, make it really plagiarism? For example, in German copyright jurisprudence (Acura is a member of the German community) there is universal acceptance of a "threshold of originality" and a single sentence is almost never considered plagiarism (only if it has the originality to be a "literary work" on his own). That's also the base for the business model of search engines.*

I also agree with qwk's stance on the topic. (qwk is a very respected member of the German community)

(*There is a newer law in Germany which grants an ancillary copyright for press publishers which has much lower "threshold", but I doubt that a forum user could be described as "press publisher", so I guess that is not applied to forum posts.)