diff -r 3efb70d2a02f -r 8f4806a1a64d versionControl/vcs.tex
--- a/versionControl/vcs.tex	Mon Jan 31 17:23:25 2011 +0530
+++ b/versionControl/vcs.tex	Mon Jan 31 17:59:35 2011 +0530
@@ -337,9 +337,9 @@
   \begin{itemize}
   \item \typ{-r n} can be passed as arguments to commands to specify
     the revision number
-  \item For instance, \typ{hg log -r0} 
+  \item For instance, \typ{hg diff -r1 -r2}
   \item \typ{m:n} specifies a range of revision numbers
-  \item \typ{-1} gives the \typ{tip}; Negative numbering can be used
+  \item For instance, \typ{hg log -r0:2}
   \end{itemize}
 \end{frame}