anchor.diff:    Alert alert;
     SubmitButtonInputElement submitElem;
     SelectElement zoneInput;
  +  TextAreaElement contentInput;
   
     ArticleForm(this.elem, this.articleService, AccountSession accountSession) {
       alert = new Alert.append(elem);
  
positive.code:     }
  
      TextInputElement urlInput = elem.querySelector('#urlInput');
      TextAreaElement contentInput = elem.querySelector('#contentInput');
  
      if (urlInput != null) {
        urlInput.value = urlInput.value.trim();
  
negative.code: import 'package:kaif_web/util.dart';
  import 'package:kaif_web/model.dart';
  import 'dart:async';
  import '../kmark/kmark_auto_linker.dart';
  
  
  typedef Future _articleCreator(String zone);
  