> The Guile manual uses the arrow,
> but that would be incorrect in the above example as “Hello world” is not
> returned by “display” — it is merely a side effect.  In the Guile manual
> this would be indicated by “⊣”.

Absolutely, and the distinction is not so useful in the context of this
tutorial.
So I think I'll simply skip it and remove the "$n = " prefix.
I'll only leave the prompt then.

-- 
Pierre Neidhardt
https://ambrevar.xyz/