Update mg_mgr_poll.md

docs/c-api/net.h/mg_mgr_poll.md

@@ -6,10 +6,10 @@ signature: |
   time_t mg_mgr_poll(struct mg_mgr *, int milli);
 ---
 
-This function performs the actual IO, and must be called in a loop
-(an event loop). Returns the current timestamp.
+This function performs the actual IO and must be called in a loop
+(an event loop). It returns the current timestamp.
 `milli` is the maximum number of milliseconds to sleep.
-`mg_mgr_poll()` checks all connection for IO readiness. If at least one
-of the connections is IO-ready, `mg_mgr_poll()` triggers respective
+`mg_mgr_poll()` checks all connections for IO readiness. If at least one
+of the connections is IO-ready, `mg_mgr_poll()` triggers the respective
 event handlers and returns.