Formatting: Don't run `wp_targeted_link_rel()` on entirely serialized content.

Props birgire, elliotcondon.
Fixes #46402.
Built from https://develop.svn.wordpress.org/trunk@45408


git-svn-id: http://core.svn.wordpress.org/trunk@45219 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/formatting.php

@@ -3040,8 +3040,10 @@ function wp_rel_nofollow_callback( $matches ) {
 function wp_targeted_link_rel( $text ) {
 	// Don't run (more expensive) regex if no links with targets.
 	if ( stripos( $text, 'target' ) !== false && stripos( $text, '<a ' ) !== false ) {
+		if ( ! is_serialized( $text ) ) {
 			$text = preg_replace_callback( '|<a\s([^>]*target\s*=[^>]*)>|i', 'wp_targeted_link_rel_callback', $text );
 		}
+	}
 
 	return $text;
 }

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45407';
+$wp_version = '5.3-alpha-45408';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.