Add an extra space after content of what's new

functions.php

/**
 * Add space after content of what's new.
 */
function rtmc_add_space_after_content() {
    ?>
    <script>
    console.log( rtMediaHook );
        if( typeof rtMediaHook == "object" ){   // check if rtMediaHook defined or not
        rtMediaHook.register(
            'rtmedia_js_file_added', // hook id here
                function ( args ) { // your function here
                    jQuery( '#whats-new' ).val( jQuery( '#whats-new' ).val() + ' ' );
                    return true;
                }
            );
        }
    </script>
    <?php
}
add_action( 'wp_footer', 'rtmc_add_space_after_content' );