| Index: sdk/lib/core/set.dart
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| diff --git a/sdk/lib/core/set.dart b/sdk/lib/core/set.dart
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| index 984c41601ddac0295a55808f85ba3e7362c809d7..7e2508c7fc8989f23345c665bb0f45f887ee91ff 100644
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| --- a/sdk/lib/core/set.dart
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| +++ b/sdk/lib/core/set.dart
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| @@ -180,7 +180,7 @@ abstract class Set<E> extends Iterable<E> implements EfficientLength {
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|    Set<E> union(Set<E> other);
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|  
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|    /**
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| -   * Returns a new set with the the elements of this that are not in [other].
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| +   * Returns a new set with the elements of this that are not in [other].
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|     *
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|     * That is, the returned set contains all the elements of this [Set] that
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|     * are not elements of [other] according to `other.contains`.
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| 
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