Run gofmt and add test to prevent regressions

Run `go fmt ./...` [1] and add a test to the `test` make target that
checks if `go fmt` has been run.

[1]: http://blog.golang.org/go-fmt-your-code

Makefile

@@ -9,6 +9,7 @@ deps:
 	go get -t -v ./...
 
 test:
+	@test -z "$(shell find . -name '*.go' | xargs gofmt -l)" || (echo "Need to run 'go fmt ./...'"; exit 1)
 	go vet ./...
 	go test -cover -short ./...
 

cli/restart.go

@@ -30,7 +30,7 @@ func restartCommandFunc(c *cli.Context, client *client.Client) error {
 	case 2:
 		branch = "master"
 		sha = args[1]
-	case 3,4,5:
+	case 3, 4, 5:
 		branch = args[1]
 		sha = args[2]
 	}

plugin/deploy/deis/deis.go

@@ -35,7 +35,7 @@ func (h *Deis) Write(f *buildfile.Buildfile) {
 
 	// git@deis.yourdomain.com:2222/drone.git
 
-	f.WriteCmd(fmt.Sprintf("git remote add deis ssh://git@%s%s.git", h.Deisurl , h.App))
+	f.WriteCmd(fmt.Sprintf("git remote add deis ssh://git@%s%s.git", h.Deisurl, h.App))
 
 	switch h.Force {
 	case true:

plugin/deploy/deployment.go

@@ -5,9 +5,9 @@ import (
 	"github.com/drone/drone/shared/build/buildfile"
 	"github.com/drone/drone/shared/build/repo"
 
+	"github.com/drone/drone/plugin/deploy/deis"
 	"github.com/drone/drone/plugin/deploy/git"
 	"github.com/drone/drone/plugin/deploy/heroku"
-	"github.com/drone/drone/plugin/deploy/deis"
 	"github.com/drone/drone/plugin/deploy/modulus"
 	"github.com/drone/drone/plugin/deploy/nodejitsu"
 	"github.com/drone/drone/plugin/deploy/tsuru"