HtmlFile:test.html
  PsiElement(HTML_DOCUMENT)
    PsiElement(XML_PROLOG)
      <empty list>
    HtmlTag:tag
      XmlToken:XML_START_TAG_START('<')
      XmlToken:XML_NAME('tag')
      XmlToken:XML_TAG_END('>')
      XmlText
        PsiWhiteSpace('\n')
      HtmlTag:a
        XmlToken:XML_START_TAG_START('<')
        XmlToken:XML_NAME('a')
        PsiWhiteSpace(' ')
        PsiElement(XML_ATTRIBUTE)
          XmlToken:XML_NAME('href')
          XmlToken:XML_EQ('=')
          PsiElement(XML_ATTRIBUTE_VALUE)
            XmlToken:XML_ATTRIBUTE_VALUE_START_DELIMITER('"')
            XmlToken:XML_ATTRIBUTE_VALUE_END_DELIMITER('"')
        PsiErrorElement:Tag start is not closed
          <empty list>
      PsiWhiteSpace('\n')
      XmlToken:XML_END_TAG_START('</')
      XmlToken:XML_NAME('tag')
      XmlToken:XML_TAG_END('>')