Force a space after empty list literal.

tests/compiler/dart2js/unparser_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #import('dart:uri');
 #import('parser_helper.dart');
 #import('mock_compiler.dart');
 #import("../../../lib/compiler/compiler.dart");
 #import("../../../lib/compiler/implementation/leg.dart", prefix:'leg');
 #import("../../../lib/compiler/implementation/dart_backend/dart_backend.dart");
@@ skipping 106 matching lines @@
   testUnparse('var x=new List<List<List<List<int>>>>();');
   testUnparse('var x=new List<List<List<List<List<int>>>>>();');
 }
 
 testForLoop() {
   testUnparse('for(;i<100;i++ ){}');
   testUnparse('for(i=0;i<100;i++ ){}');
 }
 
 testEmptyList() {
-  testUnparse('var x=[];');
+  testUnparse('var x=[] ;');
 }
 
 testClosure() {
   testUnparse('var x=(var x)=>x;');
 }
 
 testIndexedOperatorDecl() {
   testUnparseMember('operator[](int i)=>null;');
   testUnparseMember('operator[]=(int i,int j)=>null;');
 }
 
 testNativeMethods() {
   testUnparseMember('foo()native;');
   testUnparseMember('foo()native "bar";');
   testUnparseMember('foo()native "this.x = 41";');
 }
 
 testPrefixIncrements() {
   testUnparse(' ++i;');
   testUnparse(' ++a[i];');
   testUnparse(' ++a[ ++b[i]];');
 }
 
 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]}]]){}');
 }
 
 testSimpleFileUnparse() {
   final src = '''
 should_be_dropped() {
 }
 
 should_be_kept() {
 }
@@ skipping 683 matching lines @@
   testDoubleMains();
   testInterfaceDefaultAnotherLib();
   testStaticAccessIoLib();
   testLocalFunctionPlaceholder();
   testMinification();
   testClosureLocalsMinified();
   testParametersMinified();
   testTypeVariablesInDifferentLibraries();
   testDeclarationTypePlaceholders();
 }