Docs: Add documentation for WP_Comments_List_Table::display().

Props itowhid06, dinhtungdu.
Fixes #47929.

git-svn-id: https://develop.svn.wordpress.org/trunk@46336 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-comments-list-table.php

@@ -487,6 +487,9 @@ protected function get_default_primary_column_name() {
 	}
 
 	/**
+	 * Display the comments table. Override the parent method to render extra comments.
+	 *
+	 * @since 3.1.0
 	 */
 	public function display() {
 		wp_nonce_field( 'fetch-list-' . get_class( $this ), '_ajax_fetch_list_nonce' );