Issue #3117414 by pjotr.savitski, jcnventura: hook_user_format_name_alter has incorrect code

openid_connect.module

@@ -94,7 +94,7 @@ function openid_connect_user_format_name_alter(&$name, $account) {
   // Ensure that usernames are not displayed if they are email addresses, or if
   // they are generated names starting with 'oidc_'.
   $oidc_name = \Drupal::service('user.data')->get('openid_connect', $account->id(), 'oidc_name');
-  if (!empty($oidc_name) && (strpos($name, 'oidc_') === 0 || strpos($name, '@'))) {
+  if (!empty($oidc_name) && (strpos($name, 'oidc_') !== 0) && (strpos($name, '@') !== FALSE)) {
     $name = $oidc_name;
   }
 }