builder/digitalocean: fix build

builder/digitalocean/builder.go

@@ -4,6 +4,7 @@
 package digitalocean
 
 import (
+	"fmt"
 	"log"
 	"time"
 
@@ -47,7 +48,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 	// Build the steps
 	steps := []multistep.Step{
 		&stepCreateSSHKey{
-			Debug: b.config.PackerDebug,
+			Debug:        b.config.PackerDebug,
 			DebugKeyPath: fmt.Sprintf("do_%s.pem", b.config.PackerBuildName),
 		},
 		new(stepCreateDroplet),