Bug#818175: dh-python 2.20160609 now warns if nothing is done

[Piotr Ożarowski]

[Raphael Hertzog, 2016-06-10]
> We just need to rebuild the package build-depending on dh-python,
> and then grep buildlogs on "E: no package to act on" to find out how many
> are affected. Is that correct?

correct