This patch sets the svn:mime-type property to text/xml for all templates that don't have that already. (The older templates apparently all have it already.) I'm not sure it's necessary, but I suppose it doesn't do any harm.
Basically what I did was run the following inside the templates folder:
svn propset svn:eol-style native *.xml svn propset svn:mime-type text/xml *.xml svn propset svn:eol-style native */*.xml svn propset svn:mime-type text/xml */*.xml svn propset svn:eol-style native */*/*.xml svn propset svn:mime-type text/xml */*/*.xml