* lisp/info.el (Info-file-supports-index-cookies): Increment

line-beginning-position's arg from 3 to 4 because makeinfo outputs
one more line for long file names.

Fixes: debbugs:4142

lisp/ChangeLog

+2011-09-18  Juri Linkov  <juri@jurta.org>
+
+	* info.el (Info-file-supports-index-cookies): Increment
+	line-beginning-position's arg from 3 to 4 because makeinfo outputs
+	one more line for long file names (bug#4142).
+
 2011-09-18  Chong Yidong  <cyd@stupidchicken.com>
 
 	* newcomment.el (comment-normalize-vars): If prompting for

lisp/info.el

@@ -540,7 +540,7 @@ in `Info-file-supports-index-cookies-list'."
 	  (condition-case ()
 	      (if (and (re-search-forward
 			"makeinfo[ \n]version[ \n]\\([0-9]+.[0-9]+\\)"
-			(line-beginning-position 3) t)
+			(line-beginning-position 4) t)
 		       (not (version< (match-string 1) "4.7")))
 		  (setq found t))
 	    (error nil))