Empty AM objects are not serialized as a line break string: <model/> instead of <model>\n</model>. Fixes #3268

[dcrec1]

Hey, is this a valid fix for #3268 ?

Now the object is being serialized correctly but some tests needed to change: for .

[jeremy]

This addresses the symptom rather than the root cause. <model>\n</model> should behave the same as <model/>.

[ahawkins]

I agree with jeremy. Seems like this a problem with the XML parser. Is <root/> valid XML? I assume it is.