From 63b39c91646fd9f8a357d38b1f9306e84616b7d5 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@users.mediawiki.org>
Date: Thu, 17 Sep 2009 00:57:10 +0000
Subject: [PATCH] Revert r53832, r53897, r54145 "(bug 17988) Spaces before
 [[Category:]] links are no longer ignored" and followup Causes entire page to
 go blank under some circumstances.

---
 includes/parser/Parser.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/includes/parser/Parser.php b/includes/parser/Parser.php
index 85edf10eca..20af1c6a1a 100644
--- a/includes/parser/Parser.php
+++ b/includes/parser/Parser.php
@@ -1726,7 +1726,7 @@ class Parser
 
 				if ( $ns == NS_CATEGORY ) {
 					wfProfileIn( __METHOD__."-category" );
-					$s = preg_replace( "/(\s*\n)+\s*$/D", '', $s ); # bug 87
+					$s = rtrim($s . "\n"); # bug 87
 
 					if ( $wasblank ) {
 						$sortkey = $this->getDefaultSort();
@@ -1742,7 +1742,7 @@ class Parser
 					 * Strip the whitespace Category links produce, see bug 87
 					 * @todo We might want to use trim($tmp, "\n") here.
 					 */
-					$s .= trim( $prefix . $trail, "\n" ) == '' ? '' : $prefix . $trail;
+					$s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
 
 					wfProfileOut( __METHOD__."-category" );
 					continue;
-- 
2.20.1