This program is just a dummy code as an example to experience Go contribute process.
The detailed process is documented in https://golang.org/s/gophercon2018.
Change-Id: I831dba407347ec2c88bf097c93dcf89b26605fc9
Reviewed-on: https://go-review.googlesource.com/132339
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Yoshi Yamaguchi