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original commit: de8c1c6e98706b3818e0ce3309f8692db14a20f9
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@ -5690,7 +5690,7 @@
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[else (constructor-name (cadr who))]))
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(define (label-string? s)
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(and (string? s) #t)) ; (<= 0 (string-length s) 200)))
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(and (string? s) (<= 0 (string-length s) 200)))
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(define (check-instance who class class-name false-ok? v)
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(unless (or (and false-ok? (not v)) (is-a? v class))
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