Add minor stylistic fixes

Signed-off-by: Antonio Murdaca <me@runcom.ninja>

builder/internals.go

@@ -603,11 +603,10 @@ func (b *Builder) run(c *daemon.Container) error {
 
 	// Wait for it to finish
 	if ret, _ := c.WaitStop(-1 * time.Second); ret != 0 {
-		err := &jsonmessage.JSONError{
+		return &jsonmessage.JSONError{
 			Message: fmt.Sprintf("The command %v returned a non-zero code: %d", b.Config.Cmd, ret),
 			Code:    ret,
 		}
-		return err
 	}
 
 	return nil

daemon/networkdriver/bridge/driver.go

@@ -308,7 +308,7 @@ func setupIPTables(addr net.Addr, icc, ipmasq bool) error {
 				"-t", string(iptables.Nat), "-I", "POSTROUTING"}, natArgs...)...); err != nil {
 				return fmt.Errorf("Unable to enable network bridge NAT: %s", err)
 			} else if len(output) != 0 {
-				return &iptables.ChainError{Chain: "POSTROUTING", Output: output}
+				return iptables.ChainError{Chain: "POSTROUTING", Output: output}
 			}
 		}
 	}
@@ -349,7 +349,7 @@ func setupIPTables(addr net.Addr, icc, ipmasq bool) error {
 		if output, err := iptables.Raw(append([]string{"-I", "FORWARD"}, outgoingArgs...)...); err != nil {
 			return fmt.Errorf("Unable to allow outgoing packets: %s", err)
 		} else if len(output) != 0 {
-			return &iptables.ChainError{Chain: "FORWARD outgoing", Output: output}
+			return iptables.ChainError{Chain: "FORWARD outgoing", Output: output}
 		}
 	}
 
@@ -360,7 +360,7 @@ func setupIPTables(addr net.Addr, icc, ipmasq bool) error {
 		if output, err := iptables.Raw(append([]string{"-I", "FORWARD"}, existingArgs...)...); err != nil {
 			return fmt.Errorf("Unable to allow incoming packets: %s", err)
 		} else if len(output) != 0 {
-			return &iptables.ChainError{Chain: "FORWARD incoming", Output: output}
+			return iptables.ChainError{Chain: "FORWARD incoming", Output: output}
 		}
 	}
 	return nil

pkg/iptables/iptables.go

@@ -41,7 +41,7 @@ type ChainError struct {
 	Output []byte
 }
 
-func (e *ChainError) Error() string {
+func (e ChainError) Error() string {
 	return fmt.Sprintf("Error iptables %s: %s", e.Chain, string(e.Output))
 }
 
@@ -142,7 +142,7 @@ func (c *Chain) Forward(action Action, ip net.IP, port int, proto, destAddr stri
 		"--to-destination", net.JoinHostPort(destAddr, strconv.Itoa(destPort))); err != nil {
 		return err
 	} else if len(output) != 0 {
-		return &ChainError{Chain: "FORWARD", Output: output}
+		return ChainError{Chain: "FORWARD", Output: output}
 	}
 
 	if output, err := Raw("-t", string(Filter), string(action), c.Name,
@@ -154,7 +154,7 @@ func (c *Chain) Forward(action Action, ip net.IP, port int, proto, destAddr stri
 		"-j", "ACCEPT"); err != nil {
 		return err
 	} else if len(output) != 0 {
-		return &ChainError{Chain: "FORWARD", Output: output}
+		return ChainError{Chain: "FORWARD", Output: output}
 	}
 
 	if output, err := Raw("-t", string(Nat), string(action), "POSTROUTING",
@@ -165,7 +165,7 @@ func (c *Chain) Forward(action Action, ip net.IP, port int, proto, destAddr stri
 		"-j", "MASQUERADE"); err != nil {
 		return err
 	} else if len(output) != 0 {
-		return &ChainError{Chain: "FORWARD", Output: output}
+		return ChainError{Chain: "FORWARD", Output: output}
 	}
 
 	return nil
@@ -208,7 +208,7 @@ func (c *Chain) Prerouting(action Action, args ...string) error {
 	if output, err := Raw(append(a, "-j", c.Name)...); err != nil {
 		return err
 	} else if len(output) != 0 {
-		return &ChainError{Chain: "PREROUTING", Output: output}
+		return ChainError{Chain: "PREROUTING", Output: output}
 	}
 	return nil
 }
@@ -222,7 +222,7 @@ func (c *Chain) Output(action Action, args ...string) error {
 	if output, err := Raw(append(a, "-j", c.Name)...); err != nil {
 		return err
 	} else if len(output) != 0 {
-		return &ChainError{Chain: "OUTPUT", Output: output}
+		return ChainError{Chain: "OUTPUT", Output: output}
 	}
 	return nil
 }

pkg/streamformatter/streamformatter.go

@@ -3,8 +3,9 @@ package streamformatter
 import (
 	"encoding/json"
 	"fmt"
-	"github.com/docker/docker/pkg/jsonmessage"
 	"io"
+
+	"github.com/docker/docker/pkg/jsonmessage"
 )
 
 type StreamFormatter struct {

pkg/streamformatter/streamformatter_test.go

@@ -3,9 +3,10 @@ package streamformatter
 import (
 	"encoding/json"
 	"errors"
-	"github.com/docker/docker/pkg/jsonmessage"
 	"reflect"
 	"testing"
+
+	"github.com/docker/docker/pkg/jsonmessage"
 )
 
 func TestFormatStream(t *testing.T) {