Prevent repeated invocation of Clubby handler

PUBLISHED_FROM=de348f944de60d116d9d1f5d18e920991c811fa8

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

@@ -34,7 +34,7 @@ items:
 
 NOTE: Mongoose manager is single threaded. It does not protect
 its data structures by mutexes, therefore all functions that are dealing
-with particular event manager should be called from the same thread,
-with exception of `mg_broadcast()` function. It is fine to have different
+with a particular event manager should be called from the same thread,
+with exception of the `mg_broadcast()` function. It is fine to have different
 event managers handled by different threads.
 

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

@@ -6,6 +6,6 @@ signature: |
   typedef void (*mg_event_handler_t)(struct mg_connection *, int ev, void *);
 ---
 
-Callback function (event handler) prototype, must be defined by user.
-Mongoose calls event handler, passing events defined below. 
+Callback function (event handler) prototype. Must be defined by the user.
+Mongoose calls the event handler, passing events defined below.