[PATCH 09 of 10] phabricator: avoid calling differential.getrawdiff

[Jun Wu]

Excerpts from Jun Wu's message of 2017-07-04 18:58:34 -0700:
> +        path = encoding.strtolocal(c[r'currentPath'])

This should be `unitolocal`, not `strtolocal`. I can send a V2 or it could
be sed -i fixed.