[PATCH 5 of 6] py3: add r'' to make the regex pattern bytes

[Yuya Nishihara]

On Mon, 26 Jun 2017 18:54:46 +0530, Pulkit Goyal wrote:
> # HG changeset patch
> # User Pulkit Goyal <7895pulkit at gmail.com>
> # Date 1498340515 -19800
> #      Sun Jun 25 03:11:55 2017 +0530
> # Node ID 9b4f630d4488873d10af57cc28522655736df752
> # Parent  a4ababd6d202fa9575020df07bd7bde1d7575203
> py3: add r'' to make the regex pattern bytes

should say /r''/b''/, fixed in flight.