Library syntax updates. Covers all remaining files in ~/tests aprt from ~/tests/language and ~/test…

tests/corelib/collection_to_string_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.
 
 /**
  * Tests for the toString methods on collections and maps.
  */
 
-#library('collection_to_string');
-#import('dart:math', prefix: 'Math');
+library collection_to_string;
+import 'dart:math' as Math;
 
 // TODO(jjb): seed random number generator when API allows it
 
 const int NUM_TESTS = 300;
 const int MAX_COLLECTION_SIZE = 7;
 
 Math.Random rand;
 
 main() {
   rand = new Math.Random();
@@ skipping 273 matching lines @@
 bool randomBool() {
   return rand.nextBool();
 }
 
 /** Returns the alphabetized characters in a string. */
 String alphagram(String s) {
   List<int> chars = s.charCodes;
   chars.sort((int a, int b) => a - b);
   return new String.fromCharCodes(chars);
 }