Fix message for catching wrong exception in raises()

The original implementation of raises() in c6a793d apparently referenced an undeclared $exceptionname variable several times. That was later addressed 804f383 but that commit neglected to fix this reference.

Author: jmikola

tests/utils/tools.php

@@ -607,7 +607,7 @@ function raises($function, $type, $infunction = null) {
             }
             printf("OK: Got %s\n", severityToString($e->getSeverity()));
         } else {
-            printf("ALMOST: Got %s - expected %s\n", get_class($e), $exceptionname);
+            printf("ALMOST: Got %s - expected %s\n", get_class($e), ErrorException::class);
         }
         restore_error_handler();
         return $e->getMessage();