Fix TokenizerTester casing of PCDATA state name

This change updates the TokenizerTester code to expect its input test
data to have the string "Data state" to identify PCDATA tests — rather
than the string "DATA state".

The test data in the html5lib-tests suite uses "Data state", so without
this change, running TokenizerTester against html5lib-tests causes
TokenizerTester to fail with a “Broken test data” harness failure.

Author: sideshowbarker

test-src/nu/validator/htmlparser/test/TokenizerTester.java

@@ -60,7 +60,7 @@ public class TokenizerTester {
 
     private static JSONString PLAINTEXT = new JSONString("PLAINTEXT state");
 
-    private static JSONString PCDATA = new JSONString("DATA state");
+    private static JSONString PCDATA = new JSONString("Data state");
 
     private static JSONString RCDATA = new JSONString("RCDATA state");