Format all tests.

tests/language/vm/string_polymorphic_test.dart

Index: tests/language/vm/string_polymorphic_test.dart
diff --git a/tests/language/vm/string_polymorphic_test.dart b/tests/language/vm/string_polymorphic_test.dart
index 8e0dc220ddb962f6bb8010af4fa053c5d8a87a69..6e6b4741bfa12708f90df5d6c4fe7457ba8abd73 100644
--- a/tests/language/vm/string_polymorphic_test.dart
+++ b/tests/language/vm/string_polymorphic_test.dart
@@ -22,11 +22,11 @@ measure(fn, a, b) {
 main() {
   var n = LEN;
   StringBuffer s = new StringBuffer();
-  for (var i=0; i < n; ++i) s.write("A");
+  for (var i = 0; i < n; ++i) s.write("A");
   String t = s.toString();
   String u = s.toString();
   String v = s.toString() + "\u1234";
   String w = s.toString() + "\u1234";
-  for (var i=0; i<10; i++) measure(test1, t, u);
-  for (var i=0; i<10; i++) measure(test1, v, w);
+  for (var i = 0; i < 10; i++) measure(test1, t, u);
+  for (var i = 0; i < 10; i++) measure(test1, v, w);
 }