[PATCH 1 of 9 py3 v3] ui: check for --debugger in sys.argv using r-string to avoid bytes on py3

[Yuya Nishihara]

On Sun, 12 Mar 2017 13:59:09 -0400, Augie Fackler wrote:
> # HG changeset patch
> # User Augie Fackler <augie at google.com>
> # Date 1489283469 18000
> #      Sat Mar 11 20:51:09 2017 -0500
> # Node ID b2106f4f2502bc94defa43e33c7b9b18fe726f95
> # Parent  1c3352d7eaf24533ad52d4b8a024211e9189fb0b
> ui: check for --debugger in sys.argv using r-string to avoid bytes on py3

Looks generally good. I've queued this version, thanks.