Fix tests to pass on linux

logger/logger_test.go

@@ -3,6 +3,7 @@ package logger
 import (
 	"bytes"
 	"errors"
+	"fmt"
 	"io/ioutil"
 	"local/logb"
 	"os"
@@ -29,8 +30,8 @@ func TestInterface(t *testing.T) {
 		os.Stderr = was
 	}()
 
-	logger.Info("hello from %v", "me")
-	logger.Error(errors.New("bad"), "error from %v", "me")
+	logger.Info(fmt.Sprintf("hello from %v", "me"))
+	logger.Error(errors.New("bad"), fmt.Sprintf("error from %v", "me"))
 
 	if !bytes.Contains(w.Bytes(), []byte(`error from me`)) {
 		t.Errorf("%s", w.Bytes())