- Rename gif files.

git-svn-id: http://root.cern.ch/svn/root/trunk@23761 27541ba8-7e3a-0410-8455-c3a389f83636

graf2d/doc/v520/index.html

@@ -132,10 +132,10 @@
 <li> For 3D histograms painted using OpenGL (drawing options "glbox" and 
      "glbox1") a minus sign on negative bins is added in order to  
      distinguish them from positive bins.
-     <img src="graph2d01.gif">
+     <img src="graf2d_01.gif">
 <li> In <tt>THistPainter::PaintH3</tt> the palette is drawn in case of option
      COLZ. This is useful when a TTree 4D plot is painted with that option.
-     <img src="graph2d02.gif"><br>
+     <img src="graf2d_02.gif"><br>
      This image has been prodiced with the command:<pre>
      ntuple->Draw("px:py:pz:px*px","","COLZ");</pre>
 </ul>