Fix again long paths in windows - seems that we had an off by one error in this

tools/testing/dart/test_suite.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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 2134 matching lines @@
 
     // Some tests are already in [build_dir]/generated_tests.
     String GEN_TESTS = 'generated_tests/';
     if (path.contains(GEN_TESTS)) {
       int index = path.indexOf(GEN_TESTS) + GEN_TESTS.length;
       path = 'multitest/${path.substring(index)}';
     }
     path = path.replaceAll('/', '_');
     final int WINDOWS_SHORTEN_PATH_LIMIT = 60;
     if (Platform.operatingSystem == 'windows' &&
-        path.length > WINDOWS_SHORTEN_PATH_LIMIT) {
+        path.length >= WINDOWS_SHORTEN_PATH_LIMIT) {
       for (var key in PATH_REPLACEMENTS.keys) {
         if (path.startsWith(key)) {
           path = path.replaceFirst(key, PATH_REPLACEMENTS[key]);
           break;
         }
       }
     }
     return path;
   }
 }
@@ skipping 60 matching lines @@
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
  * $compileErrorSkip tests are skipped on browsers due to compile-time error
 """;
     print(report);
   }
 }