hclose return value description fix.
returns 0, not a handle
@@ -19,7 +19,7 @@ not guarantee that the handle's work will have been fully finished. E.g., outbou
# RETURN VALUE
-Returns a coroutine handle. In the case of an error, it returns -1 and sets _errno_ to one of the values.
+In the case of an error, it returns -1 and sets _errno_ to one of the values. In case of success, returns 0.
# ERRORS
