org-src preserve indentation in edit special

README.org

@@ -278,7 +278,6 @@ which prevail to-day, — a difference of method existing not in
 comparative linguistics alone, but also in other fields of
 philological and historical research that border on it.
 #+end_quote
-
 ** Buffer and Window management
 Rules and packages for buffer management and window navigation.
 
@@ -894,7 +893,8 @@ Configure email with iCalendar event support, to integrate with
 (use-package org-src
   :after org
   :custom
-    (org-src-window-setup 'reorganize-frame))
+  (org-src-preserve-indentation t)
+  (org-src-window-setup 'plain))
 
 (use-package ob-core
   :after org