docs: def make_resource_document(self, title, content, tags=[],):
          """Return a single HTML document containing the title and content."""
  
          assert "<html>" not in content
          assert "<body>" not in content
  
          return """
          <html>
          <head><title>%(title)s</title></head>
          <body>
          %(content)s
          </body>
          """ % dict(
              title=title,
              content=content,
          )