Review section 7.1: includenamespaceprefixes

All,

The `includenamespaceprefixes` attribute example is outdated.

It says the instance is serialized as:

    <qname xmlns:xforms="http://www.w3.org/2002/xforms"
       xmlns:my="http://ns.example.org/2003">my:sample</qname>

But due to the new and improved handling of inline instance date, this is
no longer correct. Instead, the result would be:

  <qname>my:sample</qname>

So we need to update this example to show something that makes sense.

-Erik