fixed second problem in http://groups.google.com/group/git-python/browse_thread/thread/b8f3580abf31f9db?hl=en#

I'll look at the other one in an hour

Author: apollo13

lib/git/commit.py

@@ -154,7 +154,7 @@ def list_from_string(cls, repo, text):
         return commits
 
     @classmethod
-    def diff(cls, repo, a, b = None, paths = []):
+    def diff(cls, repo, a, b = None, paths = None):
         """
         Show diffs between two trees:
 
@@ -175,6 +175,8 @@ def diff(cls, repo, a, b = None, paths = []):
         Returns
             GitPython.Diff[]
         """
+        paths = paths or []
+
         if isinstance(b, list):
             paths = b
             b = None