cmd/godoc: use normal gofmt printer settings for playground fmt
cmd/godoc: use normal gofmt printer settings for playground fmt

R=gri
CC=golang-dev
http://codereview.appspot.com/6815081
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go