Test broken in numpy 1.14

[skoudoro]

As we can see on recent PR like here, all basic test seems to be broken.

All numpy arrays seem to be different after 10-12 decimal. I am surprised to see this problem for such basic function like vec_norm. This behavior is really weird

Unfortunately, I can not reproduce the problem on window 10, python=3.6, numpy=1.14.0.dev0+2995e6a
When I will find a time, I will try with my mac.

Do someone have any suggestions for the good way to solve this problem? @Garyfallidis @arokem @matthew-brett @anyoneelse

[skoudoro]

ok, I was totally wrong, all errors come from DOCTEST and I can reproduce them.

When we print the result, it seems there is a space after each first element in an array and it was not the case before.

[matthew-brett]

Is this the change to doctest printing in the numpy development version - that arrived here : numpy/numpy@710e032 ?

If so, I think you can fix it with a call to np.set_printoptions(sign='legacy') - see nipy/nibabel#556