merge from 3.2
diff --git a/Modules/selectmodule.c b/Modules/selectmodule.c
index 5aa67dd..20f23d9 100644
--- a/Modules/selectmodule.c
+++ b/Modules/selectmodule.c
@@ -921,7 +921,7 @@
PyDoc_STRVAR(pyepoll_register_doc,
"register(fd[, eventmask]) -> None\n\
\n\
-Registers a new fd or modifies an already registered fd.\n\
+Registers a new fd or raises an IOError if the fd is already registered.\n\
fd is the target file descriptor of the operation.\n\
events is a bit set composed of the various EPOLL constants; the default\n\
is EPOLL_IN | EPOLL_OUT | EPOLL_PRI.\n\