remove spaces around em dashes
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@ -329,8 +329,8 @@ Note that @racket[syntax-shift-phase-level] merely creates a reference
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across phases. To make that reference work, we still need to instantiate our
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module at both phases so the reference and its target have their bindings
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available. Thus, in module @racket['b],
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we still import module @racket['a] at both phase 0 and phase 1
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--- using @racket[(require 'a (for-syntax 'a))] --- so we have a phase-1
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we still import module @racket['a] at both phase 0 and phase
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1---using @racket[(require 'a (for-syntax 'a))]---so we have a phase-1
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binding for @racket[see-button] and a phase-0 binding for @racket[button].
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Now macro @racket[m] will work.
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