Force a space after empty list literal.

tests/compiler/dart2js/unparser_test.dart

Index: tests/compiler/dart2js/unparser_test.dart
diff --git a/tests/compiler/dart2js/unparser_test.dart b/tests/compiler/dart2js/unparser_test.dart
index a69c08ce5e53ca7f32fa794c225aeb3ea98a01dd..0d72f0843f78d90ddd5efd72362d9c6b5a76f2f5 100644
--- a/tests/compiler/dart2js/unparser_test.dart
+++ b/tests/compiler/dart2js/unparser_test.dart
@@ -124,7 +124,7 @@ testForLoop() {
 }
 
 testEmptyList() {
-  testUnparse('var x=[];');
+  testUnparse('var x=[] ;');
 }
 
 testClosure() {
@@ -149,9 +149,9 @@ testPrefixIncrements() {
 }
 
 testConstModifier() {
-  testUnparse('foo([var a=const[]]){}');
+  testUnparse('foo([var a=const[] ]){}');
   testUnparse('foo([var a=const{}]){}');
-  testUnparse('foo(){var a=const[];var b=const{};}');
+  testUnparse('foo(){var a=const[] ;var b=const{};}');
   testUnparse('foo([var a=const[const{"a":const[1,2,3]}]]){}');
 }