removes duplicate word.

See merge request spritely/spritely-papers!1

Thanks again, Jakob!

Thanks for the suggestion, Jakob L. Kreuze!

Thanks again Robin!

Thanks again Robin

Thanks again Robin Templeton!

Thanks again to Robin Templeton for this one

Thanks again Robin Templeton

Thanks Robin Templeton for the catch. @frandallfarmer probably agrees. ;)

Thanks again Robin Templeton

Thanks again Robin Templeton

Suggestion from Leilani.

Thanks for catching that, Dan Finlay

Thanks ArneBab!

- Show an eq? vs equal? example
- Explain and demonstrate that anything not #f is truth'y in S...

Still a Racket version holdover

Thanks for the suggestions, Jessica!

that's no longer how the lines-starting-with-keyword-stuff works :)

Also flesh out some footnotes, reorder the evaluator's match clauses
for easier explainability, ...