Fixed callback

Author: samdark

lib/Diff/Renderer/Html/Array.php

@@ -185,11 +185,12 @@ private function formatLines($lines)
 	/**
 	 * Replace a string containing spaces with a HTML representation using  .
 	 *
-	 * @param string $spaces The string of spaces.
+	 * @param string $matches Regex matches array.
 	 * @return string The HTML representation of the string.
 	 */
-	public static function fixSpaces($spaces='')
+	public static function fixSpaces($matches)
 	{
+		$spaces = isset($matches[1]) ? $matches[1] : '';
 		$count = strlen($spaces);
 		if($count == 0) {
 			return '';