auth=b'Basic ' will throw a SyntaxError on 2.5

--HG--
branch : distribute
extra : rebase_source : cbac0260bc300fc00ce3517ecd96d5bedc5cd896

setuptools/command/upload_docs.py

@@ -92,7 +92,7 @@ class upload_docs(upload):
         try:  # base64 only works with bytes in Python 3.
             encoded_creds = base64.encodebytes(credentials.encode('utf8'))
             auth = b"Basic "
-        except AttributeError:
+        except (AttributeError, SyntaxError):
             encoded_creds = base64.encodestring(credentials)
             auth = "Basic "
         auth += encoded_creds.strip()