defaultvalue: Fix some very broken indentation

and while here, use the more typical : to separate the type and property

testsuite/gtk/defaultvalue.c

@@ -363,9 +363,12 @@ G_GNUC_END_IGNORE_DEPRECATIONS
         continue;
 
       if (g_test_verbose ())
-      g_print ("Property %s.%s\n",
-	     g_type_name (pspec->owner_type),
-	     pspec->name);
+        {
+          g_print ("Property %s:%s\n",
+                   g_type_name (pspec->owner_type),
+                   pspec->name);
+        }
+
       g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
       g_object_get_property (instance, pspec->name, &value);
       check_property ("Property", pspec, &value);