WordPress at a glance
function is not described

wp_post_revision_title() WP 2.6.0

Retrieve formatted date timestamp of a revision (linked to that revisions's page).

No Hooks.

Return

String/false. i18n formatted datetimestamp or localized 'Current Revision'.

Usage

wp_post_revision_title( $revision, $link );
$revision(int/object) (required)
Revision ID or revision object.
$link(true/false)
Link to revisions's page?
Default: true

Code of wp post revision title: wp-includes/post-template.php VER 5.1.1

<?php
function wp_post_revision_title( $revision, $link = true ) {
	if ( ! $revision = get_post( $revision ) ) {
		return $revision;
	}

	if ( ! in_array( $revision->post_type, array( 'post', 'page', 'revision' ) ) ) {
		return false;
	}

	/* translators: revision date format, see https://secure.php.net/date */
	$datef = _x( 'F j, Y @ H:i:s', 'revision date format' );
	/* translators: %s: revision date */
	$autosavef = __( '%s [Autosave]' );
	/* translators: %s: revision date */
	$currentf = __( '%s [Current Revision]' );

	$date = date_i18n( $datef, strtotime( $revision->post_modified ) );
	if ( $link && current_user_can( 'edit_post', $revision->ID ) && $link = get_edit_post_link( $revision->ID ) ) {
		$date = "<a href='$link'>$date</a>";
	}

	if ( ! wp_is_post_revision( $revision ) ) {
		$date = sprintf( $currentf, $date );
	} elseif ( wp_is_post_autosave( $revision ) ) {
		$date = sprintf( $autosavef, $date );
	}

	return $date;
}