Fixed typo in GroupingMapBy doc
@@ -36,7 +36,7 @@ pub fn new<I, K, V>(iter: I) -> GroupingMap<I>
GroupingMap { iter }
}
-/// `GroupingMap` is an intermediate struct for efficient group-and-fold operations.
+/// `GroupingMapBy` is an intermediate struct for efficient group-and-fold operations.
/// It groups elements by the key returned by the specified function and at the same
/// time fold each group using some aggregating operation.
///
