code: def html(self):
          
          formatter = HtmlFormatter(
              cssclass=self.DIV_CSS_CLASS,
              linenos=True,
              linenostart=self._start_line,
              hl_lines=self._shift_lines(
                  self._violation_lines,
                  self._start_line
              ),
              lineanchors=self._src_filename
          )
  
          return pygments.format(self.src_tokens(), formatter)
docs: Return an HTML representation of the snippet.