As much as I understand the urge to step in when somebody is wrong on the internet ... The R in PR is for "request", isn't it? A merged pull request is still a request (which was satisfied/merged).
If I ask you a question and you answer it, and then I show you a link to a document containing my question, then what somebody finds when following that link is still a (now-answered) question, isn't it?
Incorrect, the link is to a PR from the creator of Clickbench and already merged. It is not a "request".