1 files changed, 7 insertions, 6 deletions
diff --git a/git.go b/git.go
index 28196c8..4c798b3 100644
--- a/git.go
+++ b/git.go
@@ -10,8 +10,8 @@ import (
 	"bytes"
 	"errors"
 	"runtime"
-	"unsafe"
 	"strings"
+	"unsafe"
 )
 
 const (
@@ -22,6 +22,7 @@ const (
 
 var (
 	ErrIterOver = errors.New("Iteration is over")
+	ErrInvalid  = errors.New("Invalid state for operation")
 )
 
 func init() {
@@ -93,7 +94,7 @@ func (oid *Oid) Equal(oid2 *Oid) bool {
 }
 
 func (oid *Oid) IsZero() bool {
-	for _, a := range(oid.bytes) {
+	for _, a := range oid.bytes {
 		if a != '0' {
 			return false
 		}
@@ -131,10 +132,10 @@ func ShortenOids(ids []*Oid, minlen int) (int, error) {
 
 type GitError struct {
 	Message string
-	Code int
+	Code    int
 }
 
-func (e GitError) Error() string{
+func (e GitError) Error() string {
 	return e.Message
 }
 
@@ -147,14 +148,14 @@ func LastError() error {
 }
 
 func cbool(b bool) C.int {
-	if (b) {
+	if b {
 		return C.int(1)
 	}
 	return C.int(0)
 }
 
 func ucbool(b bool) C.uint {
-	if (b) {
+	if b {
 		return C.uint(1)
 	}
 	return C.uint(0)