Format all tests.

tests/corelib/bit_twiddling_bigint_test.dart

Index: tests/corelib/bit_twiddling_bigint_test.dart
diff --git a/tests/corelib/bit_twiddling_bigint_test.dart b/tests/corelib/bit_twiddling_bigint_test.dart
index 042f7b895c7fb507f8c49735e5ef7799c0fbd69c..a67ccae89e2505a843747e9d0412703e6b287c6a 100644
--- a/tests/corelib/bit_twiddling_bigint_test.dart
+++ b/tests/corelib/bit_twiddling_bigint_test.dart
@@ -4,6 +4,7 @@
 // Testing Bigints.
 
 library bit_twiddling_test;
+
 import "package:expect/expect.dart";
 
 // See bit_twiddling_test.dart first.  This file contains only the tests that
@@ -13,7 +14,7 @@ testBitLength() {
   check(int i, width) {
     Expect.equals(width, i.bitLength, '$i.bitLength ==  $width');
     // (~i) written as (-i-1) to avoid issues with limited range of dart2js ops.
-    Expect.equals(width, (-i-1).bitLength, '(~$i).bitLength == $width');
+    Expect.equals(width, (-i - 1).bitLength, '(~$i).bitLength == $width');
   }
 
   check(0xffffffffffffff, 56);
@@ -22,7 +23,6 @@ testBitLength() {
   check(0x1000000000000000000, 73);
   check(0x1000000000000000001, 73);
 
-
   check(0xfffffffffffffffffffffffffffffffffffffe, 152);
   check(0xffffffffffffffffffffffffffffffffffffff, 152);
   check(0x100000000000000000000000000000000000000, 153);
@@ -43,15 +43,15 @@ testToUnsigned() {
 
 testToSigned() {
   checkS(src, width, expected) {
-    Expect.equals(expected, src.toSigned(width),
-        '$src.toSigned($width) == $expected');
+    Expect.equals(
+        expected, src.toSigned(width), '$src.toSigned($width) == $expected');
   }
 
   checkS(0x100000100000000000001, 2, 1);
-  checkS(0x100000200000000000001, 60,  0x200000000000001);
-  checkS(0x100000200000000000001, 59,  0x200000000000001);
+  checkS(0x100000200000000000001, 60, 0x200000000000001);
+  checkS(0x100000200000000000001, 59, 0x200000000000001);
   checkS(0x100000200000000000001, 58, -0x200000000000000 + 1);
-  checkS(0x100000200000000000001, 57,  1);
+  checkS(0x100000200000000000001, 57, 1);
 }
 
 main() {