Format all dart dev compiler files

pkg/dev_compiler/test/codegen/sunflower/sunflower.dart

Index: pkg/dev_compiler/test/codegen/sunflower/sunflower.dart
diff --git a/pkg/dev_compiler/test/codegen/sunflower/sunflower.dart b/pkg/dev_compiler/test/codegen/sunflower/sunflower.dart
index 5f7894608dbca47bac5b13184ab03ec647f5115f..d74dfce25943ca793b2b2506bba9c1d28964c96d 100644
--- a/pkg/dev_compiler/test/codegen/sunflower/sunflower.dart
+++ b/pkg/dev_compiler/test/codegen/sunflower/sunflower.dart
@@ -47,7 +47,7 @@ void draw() {
 // This example was modified to use classes and mixins.
 class SunflowerSeed extends Circle with CirclePainter {
   SunflowerSeed(num x, num y, num radius, [String color])
-  : super(x, y, radius) {
+      : super(x, y, radius) {
     if (color != null) this.color = color;
   }
 }