code: def block_code(self, code, lang=None):
          
          code = code.rstrip('\n')
          if not lang:
              code = escape(code, smart_amp=False)
              return '<pre><code>%s\n</code></pre>\n' % code
          code = escape(code, quote=True, smart_amp=False)
          return '<pre><code class="lang-%s">%s\n</code></pre>\n' % (lang, code)
docs: Rendering block level code. ``pre > code``.
  
          :param code: text content of the code block.
          :param lang: language of the given code.