shiny/example/goban: Fix comment
shiny/example/goban: Fix comment

Change-Id: I0ce7278ba13ca898ed8542253bb0d83785a4373b
Reviewed-on: https://go-review.googlesource.com/20721
Reviewed-by: David Crawshaw <a2f0bf29257797dd66800b4fbb9945c3e216c004@golang.org>

AkihiroSuda/golang-exp-aspectgo,golang/exp,golang/exp,AkihiroSuda/golang-exp-aspectgo,golang/exp,AkihiroSuda/golang-exp-aspectgo