tools/pythonlibs/riotctrl_*: add code format check with black #16915
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Contribution description
This PR applies the black automatic code formater to riotctrl pythonlibs, similar to #16907 and #16905.
I couldn't a better solution on how to call black from the tox env. When black is called directly, the files with
py
are taken into account by default and specifying*.py
, returns an error. Wrapping the call in bash works (only solution I found).There's room to use f-strings in this code but it's not part of this PR.
Testing procedure
Green CI
Issues/PRs references
similar to #16907 and #16905