trying to arc-patch this diff fails
```
Downloading binary data for 'roomba-dog.jpg'...
Checking patch roomba-dog.jpg => dogs/roomba-dog.jpg...
error: the patch applies to 'roomba-dog.jpg' (fb5c503f27d80b12f96c3d850a3f4622f8014599), which does not match the current contents.
error: roomba-dog.jpg: patch does not apply
```