Fix part 3 of bug #10183 with input-method prompt in I-search.

 lisp/isearch.el (isearch-message-prefix): Run the input method part
 of the prompt through bidi-string-mark-left-to-right.

lisp/ChangeLog

+2011-12-02  Eli Zaretskii  <eliz@gnu.org>
+
+	* isearch.el (isearch-message-prefix): Run the input method part
+	of the prompt through bidi-string-mark-left-to-right.  (Bug#10183)
+
 2011-12-02  Juri Linkov  <juri@jurta.org>
 
 	* isearch.el (isearch-occur): Use `word-search-regexp' for

lisp/isearch.el

@@ -2225,7 +2225,11 @@ If there is no completion possible, say so and continue searching."
 		   (if nonincremental "search" "I-search")
 		   (if isearch-forward "" " backward")
 		   (if current-input-method
-		       (concat " [" current-input-method-title "]: ")
+		       ;; Input methods for RTL languages use RTL
+		       ;; characters for their title, and that messes
+		       ;; up the display of the prompt.
+		       (bidi-string-mark-left-to-right
+			(concat " [" current-input-method-title "]: "))
 		     ": ")
 		   )))
     (propertize (concat (upcase (substring m 0 1)) (substring m 1))