Whoops. Now I don't know what to do anymore. Ask questions in a question-specific PR or in the forum? I tend to agree with Cervator as having the question near its code-context makes it probably easier to address. But I can certainly accept that questions shouldn't get into the code and either a PR eventually becomes free of them, before being merged into the official branch, or questions-only PRs are flagged up as such and immediately closed, the discussion nevertheless continuing as we did here. 

Perhaps some more thoughts from other programmers in the project should be solicited? Or perhaps we should google around to see if there is a broadly accepted best practice on this regard? Whatever the case, it'd be probably good to eventually publish it in the forum/wiki as part of the coding and workflow standards.