Allow multi-codeunit padding in String.padLeft/padRight.

tests/corelib/core_runtime_types_test.dart

 // Copyright (c) 2011, 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 "package:expect/expect.dart";
 
 /**
  * A test of simple runtime behavior on numbers, strings and lists with
  * a focus on both correct behavior and runtime errors.
  *
@@ skipping 65 matching lines @@
     assertEquals(x | y, 19);
     assertEquals(x & y, 16);
     assertEquals(x ^ y, 3);
     assertEquals(2 >> 1, 1);
     assertEquals(1 << 1, 2);
   }
 
   static testOperatorErrors() {
     var objs = [1, '2', [3], null, true, new Map()];
     for (var i=0; i < objs.length; i++) {
-      for (var j=i+1; j < objs.length; j++) {
+      for (var j= i + 1; j < objs.length; j++) {
         testBinaryOperatorErrors(objs[i], objs[j]);
-        testBinaryOperatorErrors(objs[j], objs[i]);
+        // Allow "String * int".
+        if (j > 2) testBinaryOperatorErrors(objs[j], objs[i]);
       }
       if (objs[i] != 1) {
         testUnaryOperatorErrors(objs[i]);
       }
     }
   }
 
   static testBinaryOperatorErrors(x, y) {
     assertTypeError(() { x - y;});
     assertTypeError(() { x * y;});
@@ skipping 178 matching lines @@
     '${true}'.toString();
     '${false}'.toString();
     ''.toString();
     ''.endsWith('');
   }
 }
 
 main() {
   CoreRuntimeTypesTest.testMain();
 }