Better handling of received signals #168
Merged
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Improve signal handling (specially ^C):
testslide
does not spit stack trace for ^C.util/run_silent_if_successful.py
:util/
to black, mypy & flake8.Before:
![image](https://user-images.githubusercontent.com/1386232/79690085-8e066600-8250-11ea-869e-7315102064e6.png)
![image](https://user-images.githubusercontent.com/1386232/79690092-99599180-8250-11ea-9d6c-c379905add32.png)
After: