Update tokenizer to match spec

sky/tests/lowlevel/camel-case.sky

Index: sky/tests/lowlevel/camel-case.sky
diff --git a/sky/tests/lowlevel/camel-case.sky b/sky/tests/lowlevel/camel-case.sky
index 89271ad61c0da3107e9744f5048284175501e4e3..fade0ebc4ff97e4533070b62374978dfe5f6738d 100644
--- a/sky/tests/lowlevel/camel-case.sky
+++ b/sky/tests/lowlevel/camel-case.sky
@@ -4,7 +4,7 @@
 <script>
 describe('Element tag names', function() {
   it('should have various casing', function() {
-    assert.equal(document.documentElement.tagName, 'camelcase');
+    assert.equal(document.documentElement.tagName, 'CamelCase');
 
     var element = document.createElement('CamelCase');
     assert.equal(element.tagName, 'CamelCase');