Hacking format of Expect failure messages to play nice with rendered HTML.

client/testing/unittest/unittest.dart

Index: client/testing/unittest/unittest.dart
===================================================================
--- client/testing/unittest/unittest.dart	(revision 2926)
+++ client/testing/unittest/unittest.dart	(working copy)
@@ -92,13 +92,20 @@
       <tr>
         <td>${test_.id}</td>
         <td class="unittest-${test_.result}">${test_.result.toUpperCase()}</td>
-        <td>Expectation: ${test_.description}. ${test_.message}</td>
+        <td>Expectation: ${test_.description}. ${_htmlEscape(test_.message)}</td>
       </tr>''';
 
   if (test_.stackTrace != null) {
     html +=
-        '<tr><td></td><td colspan="2"><pre>${test_.stackTrace}</pre></td></tr>';
+        '<tr><td></td><td colspan="2"><pre>${_htmlEscape(test_.stackTrace)}</pre></td></tr>';
   }
 
   return html;
 }
+
+//TODO(pquitslund): Move to a common lib
+String _htmlEscape(String string) {
+  return string.replaceAll('&', '&amp;')
+               .replaceAll('<','&lt;')
+               .replaceAll('>','&gt;');
+}