Get Post Revisions on Single Post Page

/* Get Post Revisions on Single Post Page */
function jnews_revisions() {
    $post_id = get_the_ID();

    if( is_single($post_id) ) {
        $revision = wp_get_post_revisions( $post_id );
        $total = count($revision);

        $output =
            "<div class='jeg_meta_like_container jeg_meta_like jeg_meta_revisions'>
                <a class='revisions' href='#' data-id='{$post_id}' data-type='revisions' data-message=''>
                    <i class='fa fa-low-vision'></i> <span>{$total}</span>
                </a>
            </div>";

        echo jnews_sanitize_output( $output );
    }
}

add_action( 'jnews_render_before_meta_right', 'jnews_revisions' );