Don't trim strings in maybe_serialize(). Props hakre. fixes #7132 #7133 #4781 for 2.5

git-svn-id: http://svn.automattic.com/wordpress/branches/2.5@8101 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/functions.php

@@ -404,7 +404,7 @@ function delete_option( $name ) {
 
 function maybe_serialize( $data ) {
 	if ( is_string( $data ) )
-		$data = trim( $data );
+		return $data;
 	elseif ( is_array( $data ) || is_object( $data ) )
 		return serialize( $data );
 	if ( is_serialized( $data ) )