[PATCH 6 of 6 py3] py3: convert system strings to bytes in doctest of formatter.py

[Augie Fackler]

On Sun, Sep 17, 2017 at 01:19:05PM +0900, Yuya Nishihara wrote:
> # HG changeset patch
> # User Yuya Nishihara <yuya at tcha.org>
> # Date 1505619593 -32400
> #      Sun Sep 17 12:39:53 2017 +0900
> # Node ID bb791130d27bbb7f0fa2acbd39feec268997d362
> # Parent  98d8cb8a7e43cb9500eef73ae3ff75308950f778
> py3: convert system strings to bytes in doctest of formatter.py

queued, thanks