[racket] Strange contracts in the tutorial

Hi,

I'm reading the User Guide: Continue
<http://docs.racket-lang.org/continue/> and
I'm puzzled with some contracts that reads:

 ; render-blog-page: request -> doesn't ; Produces an doesn't page of the
> content of the ; BLOG.



Is it correct? What does it mean that it "produces an doesn't"?

[]'s

Rodolfo Carvalho
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