it's always helpful if the example works...
diff --git a/Doc/lib/libtrace.tex b/Doc/lib/libtrace.tex
index f13e8ae..65d1352 100644
--- a/Doc/lib/libtrace.tex
+++ b/Doc/lib/libtrace.tex
@@ -83,13 +83,15 @@
\subsubsection{Example}
\begin{verbatim}
+import sys
+
# create a Trace object, telling it what to ignore, and whether to
# do tracing or line-counting or both.
-trace = trace.Trace(ignoredirs=[sys.prefix, sys.exec_prefix,], trace=0,
+tracer = trace.Trace(ignoredirs=[sys.prefix, sys.exec_prefix,], trace=0,
count=1)
-# run the new command using the given trace
-trace.run('main()')
-# make a report, telling it where you want output
-r = trace.results()
-r.write_results(show_missing=True)
+# run the new command using the given tracer
+tracer.run('main()')
+# make a report, placing output in /tmp
+r = tracer.results()
+r.write_results(show_missing=True, coverdir="/tmp")
\end{verbatim}