Provides a function which can be modified to add a custom row of HTML to the checkout shopping cart.
<?php
/*
 * Plugin Name: Easy Digital Downloads - Custom Cart Row
 * Description: Provides a function which can be modified to add a custom row of HTML to the checkout shopping cart.
 * Author: Easy Digital Downloads
 * Author URI: https://easydigitaldownloads.com/
 * Version: 1.0
 */

function edd_custom_cart_row_text() {
?>
	<tr>
		<td colspan="4">This is your custom text</td>
	</tr>
<?php
}
add_action( 'edd_cart_items_after', 'edd_custom_cart_row_text' );
To implement this snippet on your site, create a brand new, empty WordPress plugin and paste the above code inside.