Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.  You don't know how to make a good report?  See

     http://orgmode.org/manual/Feedback.html#Feedback

Your bug report will be posted to the Org mailing list.
------------------------------------------------------------------------
Bug(maybe): org-edit-special under org 9.x does not preserve the leading
spaces in black line or dose not indent the blank line after exit editing.


Reproduce steps:

Launch emacs by `emacs -Q`, eval the following snippet(assumed org 9.x
is installed via elpa)

    (package-initialize)
    (require 'org)

open a org buffer, input the source by <s and type `python`

#+BEGIN_SRC python

#+END_SRC

use C-c ' to edit the block and input

    for i in range(10):      # input this line and <enter>
        # there are 4 spaces before the '#' now

use C-c ' to close the source block buffer and back to org-mode, we can
see the first line of the block is indented 2 spaces by org while the blank
line
isn't.


​

Emacs  : GNU Emacs 25.1.1 (x86_64-apple-darwin16.3.0, Carbon Version 157
AppKit 1504.76)
 of 2016-12-23
Package: Org mode version 9.0.3 (9.0.3-elpa @
/Users/Yomisuko/.emacs.d/elpa/org-20161224/)

current state:
==============
(setq
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe
org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook
org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-shell-link-function 'yes-or-no-p
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
    org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '((closure
 (org-inlinetask-min-level buffer-face-mode-face org-mode-map
  org-tbl-menu org-org-menu org-struct-menu org-entities
  org-last-state org-id-track-globally org-clock-start-time
  texmathp-why remember-data-file
  org-agenda-tags-todo-honor-ignore-options iswitchb-temp-buflist
  calc-embedded-open-mode calc-embedded-open-formula
  calc-embedded-close-formula align-mode-rules-list
  org-emphasis-alist org-emphasis-regexp-components
  org-export-registered-backends org-modules
  org-babel-load-languages t)
 nil
 (add-hook (quote change-major-mode-hook) (quote org-show-block-all)
  (quote append) (quote local))
 )
#[0 "\300\301\302\303\304$\207"
  [add-hook change-major-mode-hook org-babel-show-result-all append
   local]
  5]
org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
 org-cycle-show-empty-lines
 org-optimize-window-after-visibility-change)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-link-parameters '(("id" :follow org-id-open)
      ("rmail" :follow org-rmail-open :store org-rmail-store-link)
      ("mhe" :follow org-mhe-open :store org-mhe-store-link)
      ("irc" :follow org-irc-visit :store org-irc-store-link)
      ("info" :follow org-info-open :export org-info-export :store
org-info-store-link)
      ("gnus" :follow org-gnus-open :store org-gnus-store-link)
      ("docview" :follow org-docview-open :export org-docview-export
:store org-docview-store-link)
      ("bibtex" :follow org-bibtex-open :store org-bibtex-store-link)
      ("bbdb" :follow org-bbdb-open :export org-bbdb-export
:complete org-bbdb-complete-link :store org-bbdb-store-link)
      ("w3m" :store org-w3m-store-link) ("file+sys") ("file+emacs")
      ("doi" :follow org--open-doi-link)
      ("elisp" :follow org--open-elisp-link)
      ("file" :complete org-file-complete-link)
      ("ftp" :follow
(lambda (path) (browse-url (concat "ftp:" path))))
      ("help" :follow org--open-help-link)
      ("http" :follow
(lambda (path) (browse-url (concat "http:" path))))
      ("https" :follow
(lambda (path) (browse-url (concat "https:" path))))
      ("mailto" :follow
(lambda (path) (browse-url (concat "mailto:" path))))
      ("message" :follow
(lambda (path) (browse-url (concat "message:" path))))
      ("news" :follow
(lambda (path) (browse-url (concat "news:" path))))
      ("shell" :follow org--open-shell-link))
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 )