added a few missing \versionadded{2.3} tags
diff --git a/Doc/lib/libmodulefinder.tex b/Doc/lib/libmodulefinder.tex
index 195b2dd..5fb9e8e 100644
--- a/Doc/lib/libmodulefinder.tex
+++ b/Doc/lib/libmodulefinder.tex
@@ -5,6 +5,8 @@
\declaremodule{standard}{modulefinder}
\modulesynopsis{Find modules used by a script.}
+\versionadded{2.3}
+
This module provides a \class{ModuleFinder} class that can be used to
determine the set of modules imported by a script.
\code{modulefinder.py} can also be run as a script, giving the