Format all tests.

tests/language_strong/field_override_optimization_test.dart

Index: tests/language_strong/field_override_optimization_test.dart
diff --git a/tests/language_strong/field_override_optimization_test.dart b/tests/language_strong/field_override_optimization_test.dart
index 573d154c4a81ac61824d6f9bacc22025b1e95d65..5e2b13ae32035e75d3f1a3238c79974a53bf1f14 100644
--- a/tests/language_strong/field_override_optimization_test.dart
+++ b/tests/language_strong/field_override_optimization_test.dart
@@ -6,8 +6,10 @@ import "package:expect/expect.dart";
 import "package:meta/meta.dart";
 
 class A {
-  @virtual final bool flag = true;
-  @virtual final int x = 42;
+  @virtual
+  final bool flag = true;
+  @virtual
+  final int x = 42;
 }
 
 class B extends A {
@@ -24,10 +26,9 @@ void main() {
     } else {
       Expect.fail('This should also be unreachable');
     }
-  } on AssertionError catch(e) {
+  } on AssertionError catch (e) {
     exception = e;
   }
   Expect.isTrue(exception is AssertionError);
   Expect.throws(() => a.x + 8);
 }
-