You know SchemeBBS allows for code to be written in more than one line, right?
There are multiline code boxes containing the output both above and below that post.
What you are currently posting is borderline unreadable (or is that the intention)?
The code is laid out as a single expression on one line as a play on the thread title. One way to see that unreadability is not a goal in itself is to note that parameter names are unobfuscated. The goal is simply intellectual amusement and recreation, with a secondary benefit of serving as a reminder that this a /prog/ board, not a /tech/ board, and those who can only participate in /tech/ threads are merely guests on our board.