[Mne_analysis] make test error on unaltered code from mne-python

[Alexandre Gramfort]

Hi Kevin,


> In terms of the rst discussion, I suggest removing...
>
> 1. A Unix (Linux or Mac OS) box: MNE command line utilities and
> Freesurfer that are required to make the best out of this toolbox
> require a Unix platform.
>
> from contributing.rst and adding a warning about .ICEauthority at the
> end of...
>
> Note that the first time this is run, the mne-python sample dataset
> (~1.2 GB) will be downloaded to the root directory and extracted. This
> is necessary for running some of the tests and nearly all of the examples.

would you mind spending a few minutes to send a PR with your edits?

> I would not version control large binary data files and continue to
> gitignore them.

sure.

Alex