Roll to pickup pool changes

packages/barback/lib/src/utils/multiset.dart

Index: packages/barback/lib/src/utils/multiset.dart
diff --git a/packages/barback/lib/src/utils/multiset.dart b/packages/barback/lib/src/utils/multiset.dart
index 4b3edea35a48b896467b509fadedbb3ffe53d8e8..8843043963e663df75f5aa16de8c82b9a8ff4641 100644
--- a/packages/barback/lib/src/utils/multiset.dart
+++ b/packages/barback/lib/src/utils/multiset.dart
@@ -29,12 +29,10 @@ class Multiset<E> extends IterableBase<E> {
         .iterator;
   }
 
-  Multiset()
-      : super();
+  Multiset() : super();
 
   /// Creates a multi-set and initializes it using the contents of [other].
-  Multiset.from(Iterable<E> other)
-      : super() {
+  Multiset.from(Iterable<E> other) : super() {
     other.forEach(add);
   }