update test

Author: chzyer

README.md

@@ -1,6 +1,7 @@
 GoLogex
 =======
 [![Build Status](https://api.travis-ci.org/chzyer/gologex.png?branch=master)](https://travis-ci.org/chzyer/gologex)
+[![GoDoc](https://godoc.org/github.com/chzyer/gologex?status.svg)](https://godoc.org/github.com/chzyer/gologex)
 
 
 An golang log lib, supports tracking and level, wrap by standard log lib

err.go

@@ -11,7 +11,7 @@ import (
 )
 
 func NewError(info string, format ...interface{}) *TrackError {
-	err := errors.New(fmt.Sprintf(info, format...))
+	err := fmt.Errorf(info, format...)
 	return &TrackError{
 		error: err,
 	}

logex_test.go

@@ -42,7 +42,7 @@ func TestLogex(t *testing.T) {
 	test(buf)
 	ret := buf.String()
 
-	println("\n--------\n", ret)
+	println("--------\n", ret)
 
 	except := []string{
 		".test:logex_test.go:19]aa",