diff --git a/src/wp-admin/includes/class-bulk-upgrader-skin.php b/src/wp-admin/includes/class-bulk-upgrader-skin.php
index 89367c4cf8..2b85c67cb7 100644
--- a/src/wp-admin/includes/class-bulk-upgrader-skin.php
+++ b/src/wp-admin/includes/class-bulk-upgrader-skin.php
@@ -79,13 +79,13 @@ class Bulk_Upgrader_Skin extends WP_Upgrader_Skin {
 	/**
 	 */
 	public function header() {
-		// Nothing, This will be displayed within a iframe.
+		// Nothing. This will be displayed within an iframe.
 	}
 
 	/**
 	 */
 	public function footer() {
-		// Nothing, This will be displayed within a iframe.
+		// Nothing. This will be displayed within an iframe.
 	}
 
 	/**