From d8dc024eb406df2d035abd862636cd442a131a83 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@users.mediawiki.org>
Date: Fri, 9 Apr 2004 00:45:15 +0000
Subject: [PATCH] Revert breakage in secureAndSplit() which failed to remove
 head/trail whitespace if provided as underlines.

---
 includes/Title.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/includes/Title.php b/includes/Title.php
index 365378e529..18bec83643 100644
--- a/includes/Title.php
+++ b/includes/Title.php
@@ -601,7 +601,15 @@ class Title {
 
 		# Clean up whitespace
 		#
-		$t = preg_replace( "/[\\s_]+/", "_", trim($this->mDbkeyform) );
+		$t = preg_replace( "/[\\s_]+/", "_", $this->mDbkeyform );
+		if ( "_" == @$t{0} ) { 
+			$t = substr( $t, 1 ); 
+		}
+		$l = strlen( $t );
+		if ( $l && ( "_" == $t{$l-1} ) ) { 
+			$t = substr( $t, 0, $l-1 ); 
+		}
+
 		if ( "" == $t ) {
 			wfProfileOut( $fname );
 			return false;
-- 
2.20.1