Fix typo in test, add check of error thrown.

sdk/lib/core/uri.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.
 
 part of dart.core;
 
 /**
  * A parsed URI, such as a URL.
  *
  * **See also:**
@@ skipping 733 matching lines @@
         } else {
           throw new UnsupportedError("Illegal path character $segment");
         }
       }
     });
   }
 
   static _checkWindowsPathReservedCharacters(List<String> segments,
                                              bool argumentError,
                                              [int firstSegment = 0]) {
-    segments.skip(firstSegment).forEach((segment) {
+    for (var segment in segments.skip(firstSegment)) {
       if (segment.contains(new RegExp(r'["*/:<>?\\|]'))) {
         if (argumentError) {
           throw new ArgumentError("Illegal character in path");
         } else {
           throw new UnsupportedError("Illegal character in path");
         }
       }
-    });
+    }
   }
 
   static _checkWindowsDriveLetter(int charCode, bool argumentError) {
     if ((_UPPER_CASE_A <= charCode && charCode <= _UPPER_CASE_Z) ||
         (_LOWER_CASE_A <= charCode && charCode <= _LOWER_CASE_Z)) {
       return;
     }
     if (argumentError) {
       throw new ArgumentError("Illegal drive letter " +
                               new String.fromCharCode(charCode));
@@ skipping 1691 matching lines @@
       0xafff,   // 0x30 - 0x3f  1111111111110101
                 //              @ABCDEFGHIJKLMNO
       0xffff,   // 0x40 - 0x4f  1111111111111111
                 //              PQRSTUVWXYZ    _
       0x87ff,   // 0x50 - 0x5f  1111111111100001
                 //               abcdefghijklmno
       0xfffe,   // 0x60 - 0x6f  0111111111111111
                 //              pqrstuvwxyz   ~
       0x47ff];  // 0x70 - 0x7f  1111111111100010
 }