[PATCH 2 of 8 py3] bundles: turn nbchanges int into a bytestr using pycompat.bytestr

[Yuya Nishihara]

On Fri, 15 Sep 2017 19:14:05 -0400, Augie Fackler wrote:
> # HG changeset patch
> # User Augie Fackler <raf at durin42.com>
> # Date 1505515116 14400
> #      Fri Sep 15 18:38:36 2017 -0400
> # Node ID 43b1c3ab1d6a4af1ea86f4e9d676d52740782895
> # Parent  662bbd6d96952985eff807f424dd128663724672
> bundles: turn nbchanges int into a bytestr using pycompat.bytestr
> 
> Fixes some python 3 failures.
> 
> diff --git a/mercurial/bundle2.py b/mercurial/bundle2.py
> --- a/mercurial/bundle2.py
> +++ b/mercurial/bundle2.py
> @@ -1448,7 +1448,7 @@ def _addpartsfromopts(ui, repo, bundler,
>      part = bundler.newpart('changegroup', data=cg.getchunks())
>      part.addparam('version', cg.version)
>      if 'clcount' in cg.extras:
> -        part.addparam('nbchanges', str(cg.extras['clcount']),
> +        part.addparam('nbchanges', pycompat.bytestr(cg.extras['clcount']),

'%d' is preferred.