Examples use int / int without __future__.division #9421
Description
Division which will behave differently in Python 2 and Python 3:
- https://lgtm.com/projects/g/scikit-learn/scikit-learn/snapshot/879d1c19deb7180045788f2ad54c9871b9ecd8fc/files/examples/linear_model/plot_sparse_logistic_regression_mnist.py#L55
- https://lgtm.com/projects/g/scikit-learn/scikit-learn/snapshot/879d1c19deb7180045788f2ad54c9871b9ecd8fc/files/examples/applications/plot_tomography_l1_reconstruction.py#L104
h/t lgtm.com via https://github.com/lgtmhq/lgtm-queries/issues/16