publish ch1/...

ch1/helloworld/main.go

@@ -1,3 +1,10 @@
+// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+// See page 1.
+
+// Helloworld is our first Go program.
+//!+
 package main
 
 import "fmt"
@@ -5,3 +12,5 @@ import "fmt"
 func main() {
 	fmt.Println("Hello, 世界")
 }
+
+//!-