update doc.

git-svn-id: http://root.cern.ch/svn/root/trunk@31851 27541ba8-7e3a-0410-8455-c3a389f83636

core/doc/v526/index.html

@@ -64,3 +64,6 @@ and now press ^O (Ctrl-o) to run the line, and prepare the next line:
 </pre>
 allowing you to re-run that part of the history without having to press the up-arrow again and again.</p>
 <p>Currently, <tt>editline</tt> is disabled on Windows.</p>
+<li>More user friendly trace-back in case of a crash, with hints where
+the problem might be.</li>
+<li>Numerous minor bug fixes...</li>