Without binding `Xml` the indentation by erlang-mode.el becomes like this:

```erlang
    "<!-- comments here --> <AccessControlPolicy> <!-- comments here -->"
        "  <Owner> <!-- blah blah blah -->"
        "    <ID>eb874c6afce06925157eda682f1b3c6eb0f3b983bbee3673ae62f41cce21f6b1</ID>"
        " <!-- c -->   <DisplayName>admin</DisplayName> <!--"
        " \n --> </Owner>"
```

Also it's easy to put some `~p` to do some formatting like `io_lib:format(Xml, [ Blah, Blah, ... ])` for future improvement. Yes, I was trying that.