Made output a little more clear

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403732

docs/htmlify/to_xml.cpp

@@ -1233,7 +1233,7 @@ void save_to_xml_file (
 {
     ofstream fout("output.xml");
 
-    fout << "<!-- This XML file was generated by the htmlify program created by Davis E. King.  See http://dlib.net for updates. -->" << endl;
+    fout << "<!-- This XML file was generated using the htmlify tool available from http://dlib.net. -->" << endl;
     fout << "<code>" << endl;
 
     fout << "  <classes>" << endl;

docs/htmlify/to_xml_example/output.xml

-<!-- This XML file was generated by the htmlify program created by Davis E. King.  See http://dlib.net for updates. -->
+<!-- This XML file was generated using the htmlify tool available from http://dlib.net. -->
 <code>
   <classes>
     <class>