org-ref breaks org-repair-export-blocks

[Julien Cubizolles <j.cubizolles@free.fr>]

Consider the following

--8<---------------cut here---------------start------------->8---
#+BEGIN_SRC elisp
(require 'package)
(setq package-archives '(("ELPA" . "http://tromey.com/elpa/")
			 ("melpa" . "http://melpa.milkbox.net/packages/")
			 ("gnu" . "http://elpa.gnu.org/packages/")
			 ("org" . "http://orgmode.org/elpa/")
			 ("marmalade" . "http://marmalade-repo.org/packages/")
			 ))
(package-initialize)
(require 'org-ref)
(defun org-repair-export-blocks ()
  "Repair export blocks and INCLUDE keywords in current buffer."
  (interactive)
  (when (eq major-mode 'org-mode)
    (let ((case-fold-search t)
	  (back-end-re (regexp-opt
			'("HTML" "ASCII" "LATEX" "ODT" "MARKDOWN" "MD" "ORG"
			  "MAN" "BEAMER" "TEXINFO" "GROFF" "KOMA-LETTER")
			t)))
      (org-with-wide-buffer
       (goto-char (point-min))
       (let ((block-re (concat "^[ \t]*#\\+BEGIN_" back-end-re)))
	 (save-excursion
	   (while (re-search-forward block-re nil t)
	     (let ((element (save-match-data (org-element-at-point))))
	       (when (eq (org-element-type element) 'special-block)
		 (save-excursion
		   (goto-char (org-element-property :end element))
		   (save-match-data (search-backward "_"))
		   (forward-char)
		   (insert "EXPORT")
		   (delete-region (point) (line-end-position)))
		 (replace-match "EXPORT \\1" nil nil nil 1))))))
       (let ((include-re
	      (format "^[ \t]*#\\+INCLUDE: .*?%s[ \t]*$" back-end-re)))
	 (while (re-search-forward include-re nil t)
	   (let ((element (save-match-data (org-element-at-point))))
	     (when (and (eq (org-element-type element) 'keyword)
			(string= (org-element-property :key element) 
				 "INCLUDE"))
	       (replace-match "EXPORT \\1" nil nil nil 1)))))))))
#+END_SRC

#+RESULTS:
: org-repair-export-blocks

#+BEGIN_LATEX
\begin{equation*}
P_{ext} = P_0
\end{equation*}
#+END_LATEX
--8<---------------cut here---------------end--------------->8---

After evaluating the elisp source block, org-repair-export-blocks
doesn't repair the LATEX block. However, (require 'org-ref) is commented
out, org-repair-export-blocks does its job.

Julien.