acloud: Fixed print the details error.

Bug: 110383583
Test: acloud create --local_image --local_instance && atest acloud_test
Change-Id: Ie7b7a4ab4cad166fbcd92f31a77e4b6043c19d77
diff --git a/create/local_image_local_instance.py b/create/local_image_local_instance.py
index a85faff..b9c9a8d 100644
--- a/create/local_image_local_instance.py
+++ b/create/local_image_local_instance.py
@@ -81,8 +81,8 @@
                                utils.TextColors.WARNING)
         # TODO(b/117366819): Should display the correct device serial
         # according to the args --serial_number.
-        utils.PrintColorString("Device serial: %s:%s" %
-                               (constants.LOCALHOST_ADB_SERIAL,
+        utils.PrintColorString("Device serial: %s" %
+                               (constants.LOCALHOST_ADB_SERIAL %
                                 constants.DEFAULT_ADB_PORT),
                                utils.TextColors.WARNING)
         if avd_spec.autoconnect: