Looks for additional docstring specifications in the correctly named
        XML files in the same directory as the module.

def _parse_docstrings(self, filepath):
        """Looks for additional docstring specifications in the correctly named
        XML files in the same directory as the module."""        
        xmlpath = self.get_xmldoc_path(filepath)
        if self.tramp.exists(xmlpath):
            xmlstring = self.tramp.read(xmlpath)
            self.modulep.docparser.parsexml(xmlstring, self.modules, xmlpath)