dictionary -> dict

Doc/whatsnew/whatsnew22.tex

@@ -163,7 +163,7 @@ factories when called.
 \end{verbatim}
 
 To make the set of types complete, new type objects such as
-\function{dictionary} and \function{file} have been added.  Here's a
+\function{dict} and \function{file} have been added.  Here's a
 more interesting example, adding a \method{lock()} method to file
 objects: