Fix dev compiler formatter error.

pkg/dev_compiler/tool/input_sdk/private/js_array.dart

Index: pkg/dev_compiler/tool/input_sdk/private/js_array.dart
diff --git a/pkg/dev_compiler/tool/input_sdk/private/js_array.dart b/pkg/dev_compiler/tool/input_sdk/private/js_array.dart
index f9546e2fe166f2bb6a0181b52f1ac64d22473384..1053949b7f24848a3451b75b0050bef4ce7c5ce7 100644
--- a/pkg/dev_compiler/tool/input_sdk/private/js_array.dart
+++ b/pkg/dev_compiler/tool/input_sdk/private/js_array.dart
@@ -243,7 +243,8 @@ class JSArray<E> implements List<E>, JSIndexable<E> {
   }
 
   /*=T*/ fold/*<T>*/(
-      /*=T*/ initialValue, /*=T*/ combine(/*=T*/ previousValue, E element)) {
+      /*=T*/ initialValue,
+      /*=T*/ combine(/*=T*/ previousValue, E element)) {
     var/*=T*/ value = initialValue;
     int length = this.length;
     for (int i = 0; i < length; i++) {