Typo fix.

Doc/whatsnew/whatsnew24.tex

@@ -1291,7 +1291,7 @@ default is 2.
 [1, 2, 3]
 >>> list(i2)               # Run the second iterator to exhaustion
 [1, 2, 3]
->\end{verbatim}
+\end{verbatim}
 
 Note that \function{tee()} has to keep copies of the values returned 
 by the iterator; in the worst case, it may need to keep all of them.