didn't understand my own comment 2 days later! Stinking comments ;-)

Author: Billy Clark

themes/material/default/selectidp-links.php

@@ -41,8 +41,8 @@ function setSelectedIdp(id) {
                    value="<?= htmlspecialchars($this->data['returnIDParam']) ?>" />
 
             <?php
-            // in order to bypass some built-in behavior, an extra idp
-            // might've been added.  It's not necessary anymore.
+            // in order to bypass some built-in simplesaml behavior, an extra idp
+            // might've been added.  It's not meant to be displayed.
             unset($this->data['idplist']['dummy']);
 
             foreach ($this->data['idplist'] as $idp) {