code: def create_chunked_body_end(trailers=None):
      
      chunk = []
      chunk.append('0\r\n')
      if trailers:
          for name, value in trailers:
              chunk.append(name)
              chunk.append(': ')
              chunk.append(value)
              chunk.append('\r\n')
      chunk.append('\r\n')
      return s2b(''.join(chunk))
docs: Create the ending that terminates a chunked body.