Fix double stdout fixes #393

[salotz]

Before raising the PR, here is a check list:

• have you written unit tests for your code changes?
• have you updated the change log?
• can someone else understand your changes without your explanation?
• are you proud of your code changes?
• please add your name and github link to contributors.rst in alphabetical order.

Any tips on how to write a test for it?

[chfw]

Your contribution is welcome!

1. would you like to run 'make format' on the source code?
2. would you like to write a unit test for it? here is the unit test I wrote for this feature: https://github.com/moremoban/moban/blob/dev/tests/integration_tests/test_command_line_options.py#L567

[salotz]

Sorry meant to circle back around to this when I had the time.

[chfw]

That's alright. It was a show stopper hence I changed my mind to close it up.

[chfw]

I have also removed v0.7.9 from pypi.