Fix missing parenthesis
diff --git a/Doc/whatsnew/whatsnew23.tex b/Doc/whatsnew/whatsnew23.tex
index 007cf08..8b3fc61 100644
--- a/Doc/whatsnew/whatsnew23.tex
+++ b/Doc/whatsnew/whatsnew23.tex
@@ -2145,7 +2145,7 @@
\item A new function, \cfunction{PyObject_DelItemString(\var{mapping},
char *\var{key})} was added
as shorthand for
-\code{PyObject_DelItem(\var{mapping}, PyString_New(\var{key})}.
+\code{PyObject_DelItem(\var{mapping}, PyString_New(\var{key}))}.
\item The \method{xreadlines()} method of file objects, introduced in
Python 2.1, is no longer necessary because files now behave as their