tighten up the contract
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@ -84,8 +84,8 @@ packages that planet has available, visit
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It returns a list matching the contract
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@racketblock[(listof (list/c string?
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string?
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(list/c exact-integer?
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exact-integer?)))]
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(list/c exact-positive-integer?
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exact-nonnegative-integer?)))]
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Each sublist represents
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the latest version of one of the packages and contains the
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userid, the package name (including ".plt"), and
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