typo detected by Erik Haugen

pep-0444.txt

@@ -176,7 +176,7 @@ an actual object instance: a function, method, or instance with a
 ``__call__`` method are all acceptable for use as an application
 object.  Application objects must be able to be invoked more than
 once, as virtually all servers/gateways (other than CGI) will make
-such repeated requests.  It this cannot be guaranteed by the
+such repeated requests.  If this cannot be guaranteed by the
 implementation of the actual application, it has to be wrapped in a
 function that creates a new instance on each call.