# HG changeset patch
# User Martin Geisler <mg@aragost.com>
# Date 1340205080 -7200
# Node ID a4b368f0b3f0fa7a50e0569961ba98f0e4635081
# Parent  9c50a8f94f94319dd3cd219762b2688456dc89ae
Explain that diff applies min/max

diff --git a/query-languages.tex b/query-languages.tex
--- a/query-languages.tex
+++ b/query-languages.tex
@@ -277,11 +277,21 @@
 %  \end{itemize}
 %\end{frame}
 
-\begin{frame}{Final Touches on Your Query}
+\begin{frame}[fragile]{Final Touches on Your Query}
   Trimming, cutting, manipulating the set:
   \begin{itemize}[<+->]
     \item \cmd{max(set)}, \cmd{min(set)}: the changeset with
       minimum/maximum revision number in the set
+
+      Commands that need two revisions apply this as needed:
+\begin{lstlisting}
+$ hg diff -r "not public()"
+\end{lstlisting}
+behaves like
+\begin{lstlisting}
+$ hg diff -r "min(not public())" -r "max(not public())"
+\end{lstlisting}
+
     \item \cmd{reverse(set)}: the ``set'' is ordered; this reverses it
     \item \cmd{limit(set, n)}, \cmd{last(set, n)}: the first/last
       $n$ changesets