Auto-export adds trailing spaces

Auto-export adds trailing spaces in hippoecm-extension.xml when duplicating a node.

• Turn auto-export on in the console.
• Duplicate a node, for instance standard in hst:pages.
• Trailing spaces are added in hippoecm-extension.xml

It seems to only happen when the console creates a new xml file, e.g. standard2.xml. If you copy a sitemap item for instance, the trailing spaces won't be there.

This makes VCS merging difficult as the whole file appears to be modified.

As a workaround, we created a small groovy script to remove to unwanted spaces.