Remove unnecessary escaping in regex

Author: gRegorLove

Mf2/Parser.php

@@ -130,7 +130,7 @@ function unicodeTrim($str) {
 function mfNamesFromClass($class, $prefix='h-') {
 	$class = str_replace(array(' ', '	', "\n"), ' ', $class);
 	$classes = explode(' ', $class);
-	$classes = preg_grep('#^(h|p|u|dt|e)-([a-z0-9]+\-)?[a-z]+(\-[a-z]+)*$#', $classes);
+	$classes = preg_grep('#^(h|p|u|dt|e)-([a-z0-9]+-)?[a-z]+(-[a-z]+)*$#', $classes);
 	$matches = array();
 
 	foreach ($classes as $classname) {