[PATCH 3 of 3 STABLE] tests: avoid unexpected result at invocation of *.py file on Windows

[Augie Fackler]

On Tue, Aug 01, 2017 at 08:52:22PM +0900, FUJIWARA Katsunori wrote:
> # HG changeset patch
> # User FUJIWARA Katsunori <foozy at lares.dti.ne.jp>
> # Date 1501518452 -32400
> #      Tue Aug 01 01:27:32 2017 +0900
> # Branch stable
> # Node ID d64e152fedf9b5e30423d9684be204aa2fa1d792
> # Parent  e5dac85fed4b0ebf699cc55374356a4020a7a891
> # Available At https://bitbucket.org/foozy/mercurial-wip
> #              hg pull https://bitbucket.org/foozy/mercurial-wip -r d64e152fedf9
> # EXP-Topic tests-portability
> tests: avoid unexpected result at invocation of *.py file on Windows

queued for stable (will be in 4.3), thanks