use Ant to fail</a>
 <a href="http://issues.apache.org/bugzilla/show_bug.cgi?id=8031">use File.toURI().toURL().toExternalForm()</a>
 <a href="http://issues.apache.org/bugzilla/show_bug.cgi?id=42222">Locator implementation not encoding URI strings properly: spaces in paths</a>
 It also breaks Eclipse 3.3 Betas
 <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=183283">Exception if installation path has spaces</a>

 Be very careful when making changes to this class, as a break will upset a lot of people.