Continuations in Racket

[MichaelBurge]

http://www.michaelburge.us/2018/03/06/continuations-in-racket.html

[gus_massa]

> `begin` does not create a new continuation frame, so its expressions are in the top-level prompt.

Just a reminder. (begin ...) sometimes is too magical, specialy inside modules. If someone want the nn magical versión, it should be replaced with (let () ...).