Index: src/wp-admin/admin-header.php
===================================================================
--- src/wp-admin/admin-header.php	(revision 51088)
+++ src/wp-admin/admin-header.php	(working copy)
@@ -57,6 +57,14 @@
 	$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 ) ) {
+		/* translators: Editor admin screen title. %s: Post title. */
+		$admin_title = sprintf( __( 'Edit “%s”' ), $post_title );
+	}
+}
+
 /**
  * Filters the title tag content for an admin page.
  *