#2079: typo in userdict docs.

Doc/lib/libuserdict.tex

@@ -10,7 +10,7 @@ methods for classes that already have a minimum mapping interface.  This
 greatly simplifies writing classes that need to be substitutable for
 dictionaries (such as the shelve module).
 
-This also module defines a class, \class{UserDict}, that acts as a wrapper
+This module also defines a class, \class{UserDict}, that acts as a wrapper
 around dictionary objects.  The need for this class has been largely
 supplanted by the ability to subclass directly from \class{dict} (a feature
 that became available starting with Python version 2.2).  Prior to the