Fixed yet one syntax error in test_xpickle in Python 2.5.
diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index 2e4c2c1..78e5943 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -746,7 +746,7 @@
             # 'P',                        # PERSID
             # 'Pabc',
             'S',                        # STRING
-            b"S'abc'",
+            "S'abc'",
             'T',                        # BINSTRING
             'T\x03\x00\x00',
             'T\x03\x00\x00\x00',