On reflection, you’re right, I didn’t mention that I opened the article. I thought I did, but that’s on me, not you or the original responder.
I disagree that the meaning is as intuitive as you claim, but I guess it doesn’t matter at this point. Thank you for drawing my attention to my mistake.
I did open the article, as you might have observed if you read my comment. However, “R (Returns)” provides very little further information than “R,” especially given just that I can’t read Japanese.
I mean, at least most of it parses as a sentence, but I want to know how that “R” ended up there. I opened the thread to find an answer, but no luck.
Now I know. Much appreciated.