Index: src/wp-admin/admin-header.php
===================================================================
--- src/wp-admin/admin-header.php	(revision 51893)
+++ src/wp-admin/admin-header.php	(working copy)
@@ -22,9 +22,10 @@
  * @global string    $update_title
  * @global int       $total_update_count
  * @global string    $parent_file
+ * @global string    $typenow
  */
 global $title, $hook_suffix, $current_screen, $wp_locale, $pagenow,
-	$update_title, $total_update_count, $parent_file;
+	$update_title, $total_update_count, $parent_file, $typenow;
 
 // Catch plugins that include admin-header.php before admin.php completes.
 if ( empty( $current_screen ) ) {
@@ -57,6 +58,15 @@
 	$admin_title = sprintf( __( 'Recovery Mode — %s' ), $admin_title );
 }
 
+if ( 'post' === $current_screen->base && 'add' !== $current_screen->action ) {
+	$post_title = get_the_title();
+	if ( ! empty( $post_title ) ) {
+		$obj = get_post_type_object( $typenow );
+		/* translators: Editor admin screen title. 1: "Edit item" text for the post type, 2: Post title. */
+		$admin_title = sprintf( __( '%1$s “%2$s”' ), $obj->labels->edit_item, $post_title );
+	}
+}
+
 /**
  * Filters the title tag content for an admin page.
  *