Advance html5lib to newest breaking changes in core: getKeys -> keys, etc

test/tokenizer_test.dart

 library tokenizer_test;
 
 // Note: mirrors used to match the getattr usage in the original test
 import 'dart:io';
 import 'dart:json';
 import 'dart:mirrors';
 import 'package:unittest/unittest.dart';
 import 'package:unittest/vm_config.dart';
 import 'package:html5lib/src/char_encodings.dart';
 import 'package:html5lib/src/constants.dart' as constants;
@@ skipping 127 matching lines @@
     // use the actual logging library.
     outputTokens.add(["ParseError", token.data]);
   }
 }
 
 List concatenateCharacterTokens(List tokens) {
   var outputTokens = [];
   for (var token in tokens) {
     if (token.indexOf("ParseError") == -1 && token[0] == "Character") {
       if (outputTokens.length > 0 &&
-          outputTokens.last().indexOf("ParseError") == -1 &&
-          outputTokens.last()[0] == "Character") {
+          outputTokens.last.indexOf("ParseError") == -1 &&
+          outputTokens.last[0] == "Character") {
 
-        outputTokens.last()[1] = '${outputTokens.last()[1]}${token[1]}';
+        outputTokens.last[1] = '${outputTokens.last[1]}${token[1]}';
       } else {
         outputTokens.add(token);
       }
     } else {
       outputTokens.add(token);
     }
   }
   return outputTokens;
 }
 
@@ skipping 99 matching lines @@
     }
   }
   return testInfo;
 }
 
 
 String camelCase(String s) {
   s = s.toLowerCase();
   var result = new StringBuffer();
   for (var match in const RegExp(r"\W+(\w)(\w+)").allMatches(s)) {
-    if (result.length == 0) result.add(s.substring(0, match.start()));
+    if (result.length == 0) result.add(s.substring(0, match.start));
     result.add(match.group(1).toUpperCase());
     result.add(match.group(2));
   }
   return result.toString();
 }
 
 void main() {
   useVmConfiguration();
   getDataFiles('tokenizer', (p) => p.endsWith('.test')).then((files) {
     for (var path in files) {
@@ skipping 13 matching lines @@
             test(testInfo["description"], () {
               testInfo["initialState"] = camelCase(initialState);
               runTokenizerTest(testInfo);
             });
           }
         }
       });
     }
   });
 }