cmd/tipgodoc: fix some nits

Change-Id: I54a98340ec2e5d54c2ca27b869c7f38b7cbfe2d7
Reviewed-on: https://go-review.googlesource.com/2536
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

cmd/tipgodoc/Dockerfile

@@ -6,4 +6,5 @@ RUN apt-get update && apt-get install --no-install-recommends -y -q build-essent
 ADD . /go/src/tipgodoc
 RUN go install tipgodoc
 ENTRYPOINT ["/go/bin/tipgodoc"]
-EXPOSE 8080 # what kubernetes expects
+# Kubernetes expects us to listen on port 8080
+EXPOSE 8080 

cmd/tipgodoc/README

@@ -1,3 +1,3 @@
 To deploy as an App Engine Manged VM, use gcloud:
 
-	$ gcloud preview app deploy .
+	$ gcloud --project golang-org preview app deploy .

cmd/tipgodoc/tip.go

@@ -134,7 +134,6 @@ func initSide(side, goHash, toolsHash string) (hostport string, err error) {
 	}
 	if err := checkout(repoURL+"tools", toolsHash, toolsDir); err != nil {
 		return "", err
-
 	}
 
 	make := exec.Command(filepath.Join(goDir, "src/make.bash"))