Format all tests.

tests/language/prefix8_negative_test.dart

Index: tests/language/prefix8_negative_test.dart
diff --git a/tests/language/prefix8_negative_test.dart b/tests/language/prefix8_negative_test.dart
index 5878046c0aad2a00981ef7256a6c34e21dac9b5f..321bf9193473a7efa54229512eca5ceed9379df8 100644
--- a/tests/language/prefix8_negative_test.dart
+++ b/tests/language/prefix8_negative_test.dart
@@ -15,6 +15,6 @@ class Test {
 
 main() {
   var Test;
-  var i = new Test.named(10);  // This should be an error.
+  var i = new Test.named(10); // This should be an error.
   Expect.equals(10, i.fld);
 }