D5570: hg-docker: fix Python 3.4 compatibility (for CentOS 7)

[Mathiasdm (Mathias De Maré)]

Mathiasdm added a comment.


  In https://phab.mercurial-scm.org/D5570#82332, @yuja wrote:
  
  > > +    if p.returncode:
  > >  +        raise Exception('failed to build docker image: %s %s' % (p.stdout, p.stderr))
  >
  > Can you change the exception type? test-check-code.t complains about it.
  
  
  I'll submit a new version. Apologies, I didn't realize code in contrib/ would have impact on the tests.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5570

To: Mathiasdm, #hg-reviewers
Cc: yuja, mercurial-devel