Fix Safari "multitest" failure.

pkg/unittest/lib/html_individual_config.dart

Index: pkg/unittest/lib/html_individual_config.dart
diff --git a/pkg/unittest/lib/html_individual_config.dart b/pkg/unittest/lib/html_individual_config.dart
index 2de4ed22d206d2ae144afb67bc05714b7fa3aa06..9c26e11c6decc14f7a7c61a967d3b6be98114cb0 100644
--- a/pkg/unittest/lib/html_individual_config.dart
+++ b/pkg/unittest/lib/html_individual_config.dart
@@ -24,11 +24,16 @@ class HtmlIndividualConfiguration extends htmlconfig.HtmlConfiguration {
   HtmlIndividualConfiguration(isLayoutTest): super(isLayoutTest);
 
   void onStart() {
-    var testGroupName = window.location.hash;
-    if (testGroupName != '') {
+    var testGroupName = window.location.search;
+    var groupVar = '&group=';

[kustermann, 2013/01/31 00:07:01]

I'd prefer something like:
for (var getParameter in window.location.search.split('&')) {
  if (getParameter.startswith('group=')) {
    testGroupName = getParameter.split('=')[1];
  }
}

As far as I can see, your code does not support
"http://host/path?group=myGroup", since you search for '&group=' and not
'?group=' !

+    if (testGroupName != '' && testGroupName.contains(groupVar)) {
       try {
-        testGroupName = testGroupName.substring(1); // cut off the #
-        unittest.filterTests('^$testGroupName');
+        testGroupName = testGroupName.substring(
+            testGroupName.indexOf(groupVar) + groupVar.length);
+        var endIndex = testGroupName.indexOf('&');
+        testGroupName = testGroupName.substring(0,
+            endIndex == -1 ? testGroupName.length : endIndex);
+        unittest.filterTests('^$testGroupName${unittest.groupSep}');
       } catch (e) {
         print('tried to match "$testGroupName"');
         print('NO_SUCH_TEST');