Reformat

builder/amazon/common/block_device.go

 package common
 
 import (
+	"strings"
+
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/ec2"
 	"github.com/mitchellh/packer/template/interpolate"
-	"strings"
 )
 
 // BlockDevice
@@ -48,12 +49,12 @@ func buildBlockDevices(b []BlockDevice) []*ec2.BlockDeviceMapping {
 		}
 
 		mapping := &ec2.BlockDeviceMapping{
-		  DeviceName:  aws.String(blockDevice.DeviceName),
-		  VirtualName: aws.String(blockDevice.VirtualName),
+			DeviceName:  aws.String(blockDevice.DeviceName),
+			VirtualName: aws.String(blockDevice.VirtualName),
 		}
 
 		if !strings.HasPrefix(blockDevice.VirtualName, "ephemeral") {
-		  mapping.EBS = ebsBlockDevice
+			mapping.EBS = ebsBlockDevice
 		}
 
 		if blockDevice.NoDevice {