Fix indentation of switch cases.

Modules/selectmodule.c

@@ -1317,7 +1317,7 @@ pyepoll_internal_ctl(int epfd, int op, PyObject *pfd, unsigned int events)
         return NULL;
     }
 
-    switch(op) {
+    switch (op) {
     case EPOLL_CTL_ADD:
     case EPOLL_CTL_MOD:
         ev.events = events;