[pygobject] test_gi: Fix for Python 2

[Martin Pitt <martinpitt src gnome org>]

commit 079b73b3eb9083bd53e06d095f9dccc02acf2a6e
Author: Martin Pitt <martinpitt gnome org>
Date:   Mon Jul 16 17:29:22 2012 +0200

    test_gi: Fix for Python 2

 tests/test_gi.py |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/tests/test_gi.py b/tests/test_gi.py
index 62ed357..4348c29 100644
--- a/tests/test_gi.py
+++ b/tests/test_gi.py
@@ -10,7 +10,7 @@ import shutil
 import os
 import locale
 import subprocess
-from io import StringIO
+from io import StringIO, BytesIO
 
 from gi.repository import GObject, GLib
 
@@ -2280,7 +2280,10 @@ class TestModule(unittest.TestCase):
     def test_help(self):
         orig_stdout = sys.stdout
         try:
-            sys.stdout = StringIO()
+            if sys.version_info.major < 3:
+                sys.stdout = BytesIO()
+            else:
+                sys.stdout = StringIO()
             help(GIMarshallingTests)
             output = sys.stdout.getvalue()
         finally: