Index: wp-includes/class-wp-rewrite.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- wp-includes/class-wp-rewrite.php	(revision 64fdd0c6a09de7421b5ac9666a3fa451acff88e4)
+++ wp-includes/class-wp-rewrite.php	(revision )
@@ -1527,10 +1527,13 @@
 		 * Filter the list of rewrite rules formatted for output to an .htaccess file.
 		 *
 		 * @since 1.5.0
+		 * @since 4.4.0 Introduced the `$site_root` and `$home_root` parameter.
 		 *
 		 * @param string $rules mod_rewrite Rewrite rules formatted for .htaccess.
+		 * @param string $home_root Home root
+		 * @param string $site_root Site root
 		 */
-		$rules = apply_filters( 'mod_rewrite_rules', $rules );
+		$rules = apply_filters( 'mod_rewrite_rules', $rules, $home_root, $site_root );
 
 		/**
 		 * Filter the list of rewrite rules formatted for output to an .htaccess file.