Also need to update when hiding sample code

so that the URL gets updated

web/regex_tester.html

@@ -271,6 +271,7 @@ $sampcodebtn->click(sub{
 		$samplecode_ta->hide;
 		$codecopy->hide;
 		$sampcodebtn->text('Show Example Perl Code');
+		update();
 	}
 	else { sampcode_show() }
 });