Added brief explanation of the \versionchanged for 1.5.2 (fixes formatting

for the HTML version).

Doc/lib/libxmllib.tex

@@ -13,7 +13,7 @@
 \deprecated{2.0}{Use \refmodule{xml.sax} instead.  The newer XML
                  package includes full support for XML 1.0.}
 
-\versionchanged{1.5.2}
+\versionchanged[Added namespace support.]{1.5.2}
 
 This module defines a class \class{XMLParser} which serves as the basis 
 for parsing text files formatted in XML (Extensible Markup Language).