Update test.dart for detection output of machine formatted errors

tools/testing/dart/test_progress.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("test_progress");
 
 #import("dart:io");
 #import("test_runner.dart");
 #import("test_suite.dart");
 
@@ skipping 106 matching lines @@
     List<String> output = new List<String>();
     output.add('');
     output.add('FAILED: ${test.configurationString} ${test.displayName}');
     StringBuffer expected = new StringBuffer();
     expected.add('Expected: ');
     for (var expectation in test.expectedOutcomes) {
       expected.add('$expectation ');
     }
     output.add(expected.toString());
     output.add('Actual: ${test.output.result}');
+    if (!test.output.diagnostics.isEmpty()) {
+      String prefix = 'diagnostics:';
+      for (var s in test.output.diagnostics) {
+        output.add('$prefix ${s}');
+        prefix = '   ';
+      }      
+    }    
     if (!test.output.stdout.isEmpty()) {
       output.add('');
       output.add('stdout:');
       for (var s in test.output.stdout) {
         output.add(s);
       }
     }
     if (!test.output.stderr.isEmpty()) {
       output.add('');
       output.add('stderr:');
@@ skipping 204 matching lines @@
     var status = 'pass';
     if (test.output.unexpectedOutput) {
       status = 'fail';
     }
     var percent = ((_completedTests() / _foundTests) * 100).toInt().toString();
     print('Done ${test.configurationString} ${test.displayName}: $status');
     print('@@@STEP_CLEAR@@@');
     print('@@@STEP_TEXT@ $percent% +$_passedTests -$_failedTests @@@');
   }
 }