docs: def wrap(indent_int, unwrap_str):
      """Wrap a single line to one or more lines that start at indent_int and end at the
      last word that will fit before WRAP_MARGIN_INT.
  
      If there are no word breaks (spaces) before WRAP_MARGIN_INT, force a break at
      WRAP_MARGIN_INT.
  
      """
      with io.StringIO() as str_buf:
          is_rest_block = unwrap_str.startswith(("- ", "* "))
  
          while unwrap_str:
              cut_pos = (unwrap_str + " ").rfind(" ", 0, WRAP_MARGIN_INT - indent_int)
  
              if cut_pos == -1:
                  cut_pos = WRAP_MARGIN_INT
  
              this_str, unwrap_str = unwrap_str[:cut_pos], unwrap_str[cut_pos + 1 :]
              str_buf.write("{}{}\n".format(" " * indent_int, this_str))
  
              if is_rest_block:
                  is_rest_block = False
                  indent_int += 2
  
          return str_buf.getvalue()