patch_sdk: fix part/import order

test/generated_sdk/lib/internal/internal.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.
 
 library dart._internal;
 
 import 'dart:collection';
 
 import 'dart:core' hide Symbol;
 import 'dart:core' as core;
 import 'dart:math' show Random;
+import 'dart:_js_primitives' show printString;
+import 'dart:_js_helper' show JS, patch;
+import 'dart:_interceptors' show JSArray;
 
 part 'iterable.dart';
 part 'list.dart';
 part 'lists.dart';
 part 'print.dart';
 part 'sort.dart';
 part 'symbol.dart';
-import 'dart:_js_primitives' show printString;
-import 'dart:_js_helper' show JS, patch;
-import 'dart:_interceptors' show JSArray;
 
 // Powers of 10 up to 10^22 are representable as doubles.
 // Powers of 10 above that are only approximate due to lack of precission.
 // Used by double-parsing.
 const POWERS_OF_TEN = const [
                         1.0,  /*  0 */
                        10.0,
                       100.0,
                      1000.0,
                     10000.0,
                    100000.0,  /*  5 */
                   1000000.0,
                  10000000.0,
                 100000000.0,
                1000000000.0,
               10000000000.0,  /* 10 */
              100000000000.0,
             1000000000000.0,
            10000000000000.0,
           100000000000000.0,
          1000000000000000.0,  /*  15 */
         10000000000000000.0,
        100000000000000000.0,
       1000000000000000000.0,
      10000000000000000000.0,
     100000000000000000000.0,  /*  20 */
    1000000000000000000000.0,
   10000000000000000000000.0,
 ];