babel: delay call to `org-export-blocks-preprocess' in export

* lisp/org-exp.el (org-export-preprocess-string): delaying code block
  processing a bit to allow correct list parsing in the export string

lisp/org-exp-blocks.el

@@ -201,9 +201,6 @@ which defaults to the value of `org-export-blocks-witheld'."
 	(interblock start (point-max))
 	(run-hooks 'org-export-blocks-postblock-hook)))))
 
-(add-hook 'org-export-preprocess-after-include-files-hook
-	  'org-export-blocks-preprocess)
-
 ;;================================================================================
 ;; type specific functions
 

lisp/org-exp.el

@@ -1080,6 +1080,9 @@ on this string to produce the exported version."
       ;; Mark end of lists
       (org-export-mark-list-ending backend)
 
+      ;; Export code blocks
+      (org-export-blocks-preprocess)
+
       ;; Handle source code snippets
       (org-export-replace-src-segments-and-examples backend)