fix environment broken in revision 1.6
diff --git a/Doc/whatsnew/whatsnew25.tex b/Doc/whatsnew/whatsnew25.tex
index 113fa32..b418a97 100644
--- a/Doc/whatsnew/whatsnew25.tex
+++ b/Doc/whatsnew/whatsnew25.tex
@@ -182,6 +182,7 @@
 a different directory as the extraction target, and to unpack only a
 subset of the archive's members.  (Contributed by Lars Gust\"abel.)
 
+\end{itemize}