Index: src/wp-includes/class-wp-editor.php
===================================================================
--- src/wp-includes/class-wp-editor.php	(revision 41168)
+++ src/wp-includes/class-wp-editor.php	(working copy)
@@ -585,7 +585,7 @@
 				 *
 				 * @since 2.0.0
 				 *
-				 * @param array  $buttons   First-row list of buttons.
+				 * @param array  $mce_buttons   First-row list of buttons.
 				 * @param string $editor_id Unique editor identifier, e.g. 'content'.
 				 */
 				$mce_buttons = apply_filters( 'mce_buttons', $mce_buttons, $editor_id );