scratch: add a new greeting with tests

Change-Id: Ibdd915b2848fb7b5503053f5a80d923828782ddf
Reviewed-on: https://go-review.googlesource.com/48728
Reviewed-by: Han-Wen Nienhuys <hanwen@google.com>
Reviewed-by: Chris Broadfoot <cbro@golang.org>
Run-TryBot: Han-Wen Nienhuys <hanwen@google.com>
2 files changed