Ignore error with non-zero exit status

[Chris Angelico]

On Tue, Dec 22, 2015 at 10:53 AM, Terry Reedy <tjreedy at udel.edu> wrote:
> Nothing has changed since except for
> https://www.python.org/dev/peps/pep-0498/
> already added to 3.6.

And the flip side of the argument is
https://www.python.org/dev/peps/pep-0461/ in 3.5, expanding on percent
formatting. Both are useful, both are supported.

ChrisA