minor typo

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@1823 e5f2f494-b856-4b98-b285-d166d9295462

src/bin/xfrin/TODO

@@ -4,5 +4,5 @@
 3. It wouldn't support IPv6 because of the following line:
         self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
 4. Xfrin.retransfer and refresh share most of the code.  should be unified.
-5. class IN in hardcode.  bad.
+5. class IN is hardcoded.  bad.
         query_question = question(name(self._zone_name), rr_class.IN(), query_type)