Change comment.

jinq0123 · jinq0123 · commit 3a249089a1cc · 2017-10-18T10:15:33.000+08:00
diff --git a/examples/cpp_cb/route_guide/route_guide_cb_client.cc b/examples/cpp_cb/route_guide/route_guide_cb_client.cc
@@ -349,7 +349,7 @@ void AsyncWriteRouteNotes(Stub::RouteChat_AsyncReaderWriter async_reader_writer)
     async_reader_writer.Write(note);
     RandomSleep();
   }
-  async_reader_writer.CloseWriting();  // Optional.
+  async_reader_writer.CloseWriting();  // Tell server.
 }
 
 void RouteChatAsync(const ChannelSptr& channel) {

Original file line number	Diff line number	Diff line change
`@@ -349,7 +349,7 @@ void AsyncWriteRouteNotes(Stub::RouteChat_AsyncReaderWriter async_reader_writer)`
`349`	`349`	`async_reader_writer.Write(note);`
`350`	`350`	`RandomSleep();`
`351`	`351`	`}`
`352`		`- async_reader_writer.CloseWriting(); // Optional.`
	`352`	`+ async_reader_writer.CloseWriting(); // Tell server.`
`353`	`353`	`}`
`354`	`354`
`355`	`355`	`void RouteChatAsync(const ChannelSptr& channel) {`