Format all tests.

tests/language_strong/number_constant_folding1_test.dart

Index: tests/language_strong/number_constant_folding1_test.dart
diff --git a/tests/language_strong/number_constant_folding1_test.dart b/tests/language_strong/number_constant_folding1_test.dart
index dfcba75b55cbdb0f094e308341dbafd08fb4538b..8ee351ca69a2b0f8a53f6e105971fc5b784fee69 100644
--- a/tests/language_strong/number_constant_folding1_test.dart
+++ b/tests/language_strong/number_constant_folding1_test.dart
@@ -7,7 +7,6 @@ import "package:expect/expect.dart";
 // On frogsh constant folded hex literals of large magnitude were truncated on
 // constant folding - Issue 636 is 'fixed', remaining concerns at Issue 638.
 
-
 highDigitTruncationTest() {
   Expect.equals(0x12345678A, 0x123456789 + 1);
 
@@ -26,7 +25,6 @@ highDigitTruncationTest() {
   Expect.equals(0xffffffffff0, 0xffffffffff * 16);
 }
 
-
 main() {
   highDigitTruncationTest();
 }