Run dartfmt on all files under runtime.

runtime/lib/map_patch.dart

Index: runtime/lib/map_patch.dart
diff --git a/runtime/lib/map_patch.dart b/runtime/lib/map_patch.dart
index 6e2f14df885046668c27ac437d5d251e642ef9b9..2cc93427d9b579491cb0bc59859e6d666c53ba00 100644
--- a/runtime/lib/map_patch.dart
+++ b/runtime/lib/map_patch.dart
@@ -2,7 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-@patch class Map<K, V> {
+@patch
+class Map<K, V> {
   // Factory constructing a Map from a parser generated Map literal.
   // [elements] contains n key-value pairs.
   // The keys are at position 2*n and are already type checked by the parser
@@ -17,9 +18,11 @@
     return map;
   }
 
-  @patch factory Map.unmodifiable(Map other) {
+  @patch
+  factory Map.unmodifiable(Map other) {
     return new UnmodifiableMapView<K, V>(new Map.from(other));
   }
 
-  @patch factory Map() = LinkedHashMap<K, V>;
+  @patch
+  factory Map() = LinkedHashMap<K, V>;
 }