Increase coverage to 91%; Much stricter about header parsing.

rietveld.py

Index: rietveld.py
diff --git a/rietveld.py b/rietveld.py
index b3895d639a2c2ade68270c713c1ce0ea68489eac..3a3366ec7e9268b99f2f365da39241c29af5b360 100644
--- a/rietveld.py
+++ b/rietveld.py
@@ -133,7 +133,8 @@ class Rietveld(object):
           out.append(patch.FilePatchBinary(
               filename,
               self.get_file_content(issue, patchset, state['id']),
-              props))
+              props,
+              status[0] == 'A'))
         else:
           if state['num_chunks']:
             diff = self.get_file_diff(issue, patchset, state['id'])