From 546425227b466dee05e821e572e4855aff051448 Mon Sep 17 00:00:00 2001
From: Matt Mullenweg <matt@git.wordpress.org>
Date: Sun, 3 Dec 2006 21:55:42 +0000
Subject: [PATCH] MSN Spaces seems to like exclamation points in their URLs,
 they must be pandering to Yahoo! ;)

git-svn-id: https://develop.svn.wordpress.org/trunk@4593 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/formatting.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index 5faac073da..cb3ddacaf8 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -1057,7 +1057,7 @@ function wp_richedit_pre($text) {
 
 function clean_url( $url ) {
 	if ('' == $url) return $url;
-	$url = preg_replace('|[^a-z0-9-~+_.?#=&;,/:%]|i', '', $url);
+	$url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%]|i', '', $url);
 	$strip = array('%0d', '%0a');
 	$url = str_replace($strip, '', $url);
 	$url = str_replace(';//', '://', $url);