Date/Time: Remove the last remaining `current_time( 'timestamp' )` instance in `wp_post_revision_title_expanded()`.

Timestamps don't carry any timezone information, using `$revision->post_modified_gmt` simplifies the logic.

Props Rarst.
See #40657.
Built from https://develop.svn.wordpress.org/trunk@45900


git-svn-id: http://core.svn.wordpress.org/trunk@45711 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/post-template.php

@@ -1877,7 +1877,7 @@ function wp_post_revision_title_expanded( $revision, $link = true ) {
 		__( '%1$s %2$s, %3$s ago (%4$s)' ),
 		$gravatar,
 		$author,
-		human_time_diff( strtotime( $revision->post_modified ), current_time( 'timestamp' ) ),
+		human_time_diff( strtotime( $revision->post_modified_gmt ) ),
 		$date
 	);
 

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45899';
+$wp_version = '5.3-alpha-45900';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.