dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/string_interpolation_opt1_test.dart

Index: tests/compiler/dart2js_extra/string_interpolation_opt1_test.dart
diff --git a/tests/compiler/dart2js_extra/string_interpolation_opt1_test.dart b/tests/compiler/dart2js_extra/string_interpolation_opt1_test.dart
index 329d6330b4115e44b9fbdbb1ce9132e38e0f2bf7..60e92d4abd5df66ad3d31be3dccda832e756726d 100644
--- a/tests/compiler/dart2js_extra/string_interpolation_opt1_test.dart
+++ b/tests/compiler/dart2js_extra/string_interpolation_opt1_test.dart
@@ -27,7 +27,7 @@ spoil(a) {
 }
 
 void testString() {
-  var a = new List(100);  // 'null' values in here are JavaScript undefined.
+  var a = new List(100); // 'null' values in here are JavaScript undefined.
   spoil(a);
   var s = returnsNullOrString('hi');
   var x = a[2];
@@ -39,7 +39,7 @@ void testString() {
 }
 
 void testInt() {
-  var a = new List(100);  // 'null' values in here are JavaScript undefined.
+  var a = new List(100); // 'null' values in here are JavaScript undefined.
   spoil(a);
   var s = returnsNullOrInt(123);
   var x = a[2];