pkg/unittest: improve output of TestCase errors in HtmlConfig

lib/html_config.dart

 // Copyright (c) 2013, 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.
 
 /// A simple unit test library for running tests in a browser.
 library unittest.html_config;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:html';
@@ skipping 44 matching lines @@
     window.onHashChange.listen((_) {
       // Location may change from individual tests setting the hash tag.
       if (window.location.hash != null &&
           window.location.hash.contains('testFilter')) {
         window.location.reload();
       }
     });
   }
 }
 
-String _toHtml(TestCase test_) {
-  if (!test_.isComplete) {
+String _toHtml(TestCase testCase) {
+  if (!testCase.isComplete) {
     return '''
         <tr>
-          <td>${test_.id}</td>
+          <td>${testCase.id}</td>
           <td class="unittest-error">NO STATUS</td>
           <td>Test did not complete</td>
         </tr>''';
   }
 
   var html = '''
       <tr>
-        <td>${test_.id}</td>
-        <td class="unittest-${test_.result}">${test_.result.toUpperCase()}</td>
-        <td>Expectation: <a href="#testFilter=${test_.description}">${test_.description}</a>. ${HTML_ESCAPE.convert(test_.message)}</td>
+        <td>${testCase.id}</td>
+        <td class="unittest-${testCase.result}">
+          ${testCase.result.toUpperCase()}
+        </td>
+        <td>
+          <p>Expectation: 
+            <a href="#testFilter=${testCase.description}">
+              ${testCase.description}
+            </a>.
+          </p>
+          <pre>${HTML_ESCAPE.convert(testCase.message)}</pre>
+        </td>
       </tr>''';
 
-  if (test_.stackTrace != null) {
+  if (testCase.stackTrace != null) {
     html = '$html<tr><td></td><td colspan="2"><pre>' +
-        HTML_ESCAPE.convert(test_.stackTrace.toString()) +
+        HTML_ESCAPE.convert(testCase.stackTrace.toString()) +
         '</pre></td></tr>';
   }
 
   return html;
 }
 
 class HtmlConfiguration extends SimpleConfiguration {
   /// Whether this is run within dartium layout tests.
   final bool _isLayoutTest;
   HtmlConfiguration(this._isLayoutTest);
@@ skipping 71 matching lines @@
     window.postMessage('unittest-suite-done', '*');
   }
 }
 
 void useHtmlConfiguration([bool isLayoutTest = false]) {
   unittestConfiguration = isLayoutTest ? _singletonLayout : _singletonNotLayout;
 }
 
 final _singletonLayout = new HtmlConfiguration(true);
 final _singletonNotLayout = new HtmlConfiguration(false);