Format all tests.

tests/language_strong/regress_16640_test.dart

Index: tests/language_strong/regress_16640_test.dart
diff --git a/tests/language_strong/regress_16640_test.dart b/tests/language_strong/regress_16640_test.dart
index 64d8654282fa37f9f44f6312ac5ba452f07a18e0..8fe8399feaef8fb178ee81b5b6482f95bbfe3aa1 100644
--- a/tests/language_strong/regress_16640_test.dart
+++ b/tests/language_strong/regress_16640_test.dart
@@ -4,11 +4,11 @@
 
 // Regression test for issue 16640.
 
-class Segment extends SegmentGen { }
+class Segment extends SegmentGen {}
 
-class SegmentGen extends ConceptEntity<Segment> { }
+class SegmentGen extends ConceptEntity<Segment> {}
 
-class ConceptEntity<E> { }
+class ConceptEntity<E> {}
 
 main() {
   new ConceptEntity<Segment>();