programming error:P fix for r852

git-svn-id: https://oauth.googlecode.com/svn/code/python@861 f7ae4463-c52f-0410-a7dc-93bad6e629e8

Author: leah.culver

oauth/oauth.py

@@ -521,7 +521,7 @@ def get_name(self):
 
     def build_signature_base_string(self, oauth_request, consumer, token):
         # concatenate the consumer key and secret
-        sig = '&%s' % escape(consumer.secret)
+        sig = '%s&' % escape(consumer.secret)
         if token:
             sig = sig + escape(token.secret)
         return sig, sig