Add a overline of title

README.org

@@ -54,6 +54,7 @@
 
    reStructuredText:
 #+BEGIN_SRC rst
+  =================================
   This is the title of the document
   =================================
 

ox-rst.el

@@ -477,6 +477,7 @@ INFO is a plist used as a communication channel."
 			   ((org-string-nw-p email) email)) title))
 		  (titleline (make-string (string-width title) ?=)))
 	(concat
+	 titleline "\n"
 	 title "\n"
 	 titleline "\n"
 	 (when (org-string-nw-p author) (concat "\n    :Author: " author))