anchor.diff:      '  </book>\n'
       '</bookstore>';
   
  -var atomXml =
  +const atomXml =
       '<?xml version="1.0" encoding="UTF-8"?>'
       '<app:service>'
       '  <app:workspace>'
  
positive.code: library xml_examples;
  
  var booksXml =
      '<?xml version="1.0"?>'
      '<catalog>'
      '   <book id="bk101">'
  
negative.code:     '   </book>'
      '</catalog>';
  
  const bookstoreXml =
      '<?xml version="1.0" encoding="ISO-8859-1"?>\n'
      '<bookstore>\n'
      '  <book>\n'
  