Force left-to-right paragraphs in Org buffers.

* org.el (org-mode): Force left-to-right paragraphs in Org
buffers.  For a related discussions, see
https://lists.gnu.org/archive/html/emacs-devel/2011-09/msg00349.html.

lisp/org.el

@@ -4811,6 +4811,7 @@ The following commands are available:
     (org-set-local 'line-move-ignore-invisible t))
   (org-set-local 'outline-regexp org-outline-regexp)
   (org-set-local 'outline-level 'org-outline-level)
+  (setq bidi-paragraph-direction 'left-to-right)
   (when (and org-ellipsis
              (fboundp 'set-display-table-slot) (boundp 'buffer-display-table)
 	     (fboundp 'make-glyph-code))