From 53acea5138c4a0e42c2853eaa6df8c4945617e0a Mon Sep 17 00:00:00 2001
From: Gabriel Wicke <gwicke@users.mediawiki.org>
Date: Fri, 14 May 2004 22:09:33 +0000
Subject: [PATCH] don't create a pre for a whitespace-only line

---
 includes/Parser.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/includes/Parser.php b/includes/Parser.php
index 0fcf83f402..e292278267 100644
--- a/includes/Parser.php
+++ b/includes/Parser.php
@@ -1256,7 +1256,7 @@ class Parser
 						$inBlockElem = true;
 					}
 				} else if ( !$inBlockElem ) {
-					if ( " " == $t{0} ) {
+					if ( " " == $t{0} and trim($t) != '' ) {
 						// pre
 						if ($this->mLastSection != 'pre') {
 							$paragraphStack = false;
-- 
2.20.1