Fix: Read() -> Recv()

I believe, there is stream.Recv() not stream.Read(), in RecordRoute(), isn't it?

examples/gotutorial.md

@@ -227,7 +227,7 @@ func (s *routeGuideServer) RecordRoute(stream pb.RouteGuide_RecordRouteServer) e
 }
 ```
 
-In the method body we use the `RouteGuide_RecordRouteServer`s `Recv()` method to repeatedly read in our client's requests to a request object (in this case a `Point`) until there are no more messages: the server needs to check the the error returned from `Read()` after each call. If this is `nil`, the stream is still good and it can continue reading; if it's `io.EOF` the message stream has ended and the server can return its `RouteSummary`. If it has any other value, we return the error "as is" so that it'll be translated to an RPC status by the gRPC layer.
+In the method body we use the `RouteGuide_RecordRouteServer`s `Recv()` method to repeatedly read in our client's requests to a request object (in this case a `Point`) until there are no more messages: the server needs to check the the error returned from `Recv()` after each call. If this is `nil`, the stream is still good and it can continue reading; if it's `io.EOF` the message stream has ended and the server can return its `RouteSummary`. If it has any other value, we return the error "as is" so that it'll be translated to an RPC status by the gRPC layer.
 
 #### Bidirectional streaming RPC
 Finally, let's look at our bidirectional streaming RPC `RouteChat()`.