Build/Test Tools: Make adjustments to how Quick Draft tests confirm expected behavior.

Twenty Twenty-One contained a filter on `the_title` to change the default post title to “Untitled”.

Whenever possible, the default behavior of Core without theme modifications should be confirmed in tests. The default behavior here is for a post title to be “(no title)” when one is not entered.

This change also makes an adjustment to be more specific when retrieving the text to verify results to prevent dates and post statuses from being pulled in.

Props davidbaumwald, desrosj, peterwilsoncc, hellofromTonya.
Fixes #54409.
Built from https://develop.svn.wordpress.org/trunk@52096


git-svn-id: http://core.svn.wordpress.org/trunk@51688 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-52095';
+$wp_version = '5.9-alpha-52096';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.