Make string formatting explicit.

pkg/minikube/cluster/cluster.go

@@ -145,7 +145,7 @@ type KubernetesConfig struct {
 
 // StartCluster starts a k8s cluster on the specified Host.
 func StartCluster(h sshAble, config KubernetesConfig) error {
-	output, err := h.RunSSHCommand(fmt.Sprintf(startCommand, config.LocalkubeURL))
+	output, err := h.RunSSHCommand(getStartCommand(config.LocalkubeURL))
 	log.Println(output)
 	if err != nil {
 		return err

pkg/minikube/cluster/commands.go

 package cluster
 
-var startCommand = `
-sudo killall localkube || true
+import "fmt"
+
+var startCommand = `sudo killall localkube || true
 # Download and install localkube, if it doesn't exist yet.
 if [ ! -e /usr/local/bin/localkube ]; then
 	sudo curl -L %s -o /usr/local/bin/localkube
@@ -32,3 +33,7 @@ fi
 # Run with nohup so it stays up. Redirect logs to useful places.
 PATH=/usr/local/sbin:$PATH nohup sudo /usr/local/bin/localkube --containerized=false start > /var/log/localkube.out 2> /var/log/localkube.err < /dev/null &
 `
+
+func getStartCommand(localkubeURL string) string {
+	return fmt.Sprintf(startCommand, localkubeURL)
+}