Typo in syntax-class documentation?

I found this in the documentation for syntax-class (Link to this section with
 @secref["stxparse-attrs" #:doc '(lib "syntax/scribblings/syntax.scrbl")]):
------------
Consider the following code:

    (define-syntax-class quark
      (pattern (a b ...)))
    (syntax-parse some-term
      [(x (y:quark ...) ... z:quark)
       some-code])

The syntax class quark exports two attributes: a at depth 0 and b at depth 1. The syntax-parse pattern has three pattern variables: x at depth 0, y at depth 2, and z at depth 0. Since x and y are annotated with the quark syntax class, the pattern also binds the following nested attributes: y.a at depth 2, y.b at depth 3, z.a at depth 0, and z.b at depth 1.
---------------

Should it be “Since y and z are annotated with the quark syntax class”? Or am I misunderstanding something?

Tim
-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.

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