code: def render_desc(desc):
      
      desc = desc + '.'
      desc_lines = split_len(desc, 54)
      if len(desc_lines) > 1:
          join_str = "'\n%s'" % (' '*21)
          lines_str = join_str.join(desc_lines)
          out = "('%s')" % lines_str
      else:
          out = "'%s'" % desc_lines[0]
      return out
docs: calculate desc string, wrapped if too long