Added assertion to better detect diff issues.

Helps fixing #35

Also, the production status was changed to 'stable', which should
have been done much earlier.

3 files changed, 3 insertions, 2 deletions

diff --git a/git/diff.py b/git/diff.py
index 3c4e8529..b59c264c 100644
--- a/git/diff.py
+++ b/git/diff.py
@@ -302,6 +302,7 @@ class Diff(object):
         diff_header = cls.re_header.match
         for diff in ('\n' + text).split('\ndiff --git')[1:]:
             header = diff_header(diff)
+            assert header is not None, "Failed to parse diff header from " % diff
 
             a_path, b_path, similarity_index, rename_from, rename_to, \
                 old_mode, new_mode, new_file_mode, deleted_file_mode, \
diff --git a/git/remote.py b/git/remote.py
index deddd1f4..ce0ed363 100644
--- a/git/remote.py
+++ b/git/remote.py
@@ -404,7 +404,7 @@ class Remote(LazyMixin, Iterable):
             self.config_reader.get('url')
             return True
         except cp.NoOptionError:
-            # we have the section at least ... 
+            # we have the section at least ...
             return True
         except cp.NoSectionError:
             return False
diff --git a/git/test/test_diff.py b/git/test/test_diff.py
index 3453f6a8..c5183089 100644
--- a/git/test/test_diff.py
+++ b/git/test/test_diff.py
@@ -80,7 +80,7 @@ class TestDiff(TestBase):
             for other in (None, commit.Index, commit.parents[0]):
                 for paths in (None, "CHANGES", ("CHANGES", "lib")):
                     for create_patch in range(2):
-                        diff_index = diff_item.diff(other, paths, create_patch)
+                        diff_index = diff_item.diff(other=other, paths=paths, create_patch=create_patch)
                         assert isinstance(diff_index, DiffIndex)
 
                         if diff_index: