Don't really understand ?
The attached patch was made on rev 508384.
It looks since this rev some refactoring has been done.
But the problem doens't look to be solved with the last snapshot deployed.
checkout plexus-utils (remove the line with <url>...</url> in the pom)
And try mvn clean site. I have just try this with apache snapshot repo in my settings and the site build failed.
Then I have try to reproduce the trouble with a doxia build from the actual trunk.
But I can't build doxia :
XmlWriterXdocSink.java:[567,30] replace(char,char) in java.lang.String cannot be applied to (java.lang.String,java.lang.String)