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

[Andreas Röhler]

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