bug#12822: python.el, python-indent-guess-indent-offset

["Andreas Röhler" <andreas.roehler@easy-emacs.de>]

Hi,

with current python.el

python-indent-guess-indent-offset proceeds:

(defun python-indent-guess-indent-offset ()
   "Guess and set `python-indent-offset' for the current buffer."
   (interactive)
   (save-excursion
     (save-restriction
       (widen)
       (goto-char (point-min))
       (let ((block-end))
         (while (and (not block-end)
                     (re-search-forward
                      (python-rx line-start block-start) nil t))
                      [...]


IIUC it fetches the first beginning of block in buffer.
As in Python every block might have it's own ideas WRT
volume of indent-step, this must fail when
indent-offset is set differently in current block.

Guessing must not take the first block from BOB, but
the next beginning of block from point upward.

IMO as it's just a guess, where the default-value might
be delivered, it also should not call `widen'.

Best,

Andreas